单选题Two aeroplanes are flying straight towards each other. One is traveling at 10 kilometres per minute, and the other at 15 kilometres per minute. Assuming that the planes are exactly 1,000 kilometres apart, what distance will be between them one minute b

题目
单选题
Two aeroplanes are flying straight towards each other. One is traveling at 10 kilometres per minute, and the other at 15 kilometres per minute. Assuming that the planes are exactly 1,000 kilometres apart, what distance will be between them one minute before they crash into each other?
A

. 10 kilometers.

B

15 kilometers.

C

25 kilometers.

D

5 kilometers.

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参考答案和解析
正确答案： D
解析：
两架飞机相向飞行，一架飞行速度每分钟10公里，另一架每分钟15公里，那么如果相撞，相撞前一分钟时两架飞机的距离应该是10+15=25公里。选项C正确。
更多“Two aeroplanes are flying straight towards each other. One i”相关问题

  • 第1题：

    请阅读短文，完成第小题。
    There was a time in my life when beauty meant something special to me. I guess that would have been when ! was about six or seven years old, just several weeks or maybe a month before the orphanage(孤儿院) turned me into an old man.
    I would get up every morning at the orphanage, make my bed just like the little soldier that I had become and then I would get into one of the two straight lines and march to breakfast with the other twenty or thirty boys who also lived in my dormitory.
    After breakfast one Saturday morning I returned to the dormitory and saw the house parent chasing the beautiful monarch butterflies who lived by the hundreds in the bushes scattered around the orphanage.
    I carefully watched as he caught these beautiful creatures, one after another, and then took them from the net and then stuck straight pins through their head and wings, pinning them onto a heavy cardboard sheet.
    How cruel it was to kill something of such beauty. I had walked many times out into the bushes, all by myself, just so the butterflies could land on my head, face and hands so I could look at them up close.
    When the telephone rang the house parent laid the large cardboard paper down on the back cement (水泥) step and went inside to answer the phone. I walked up to the cardboard and looked at the one butterfly who he had just pinned to the large paper. It was still moving about so I reached down and touched it on the wing causing one of the pins to fall out. It started flying around and around trying to get away but it was still pinned by the one wing with the other straight pin. Finally its wing broke off and the butterfly fell to the ground and just trembled.
    I picked up the torn wing and the butterfly and I spat on its wing and tried to get it to stick back on so it could fly away and be free before the house parent came back. But it would not stay on him.

    What is the author's attitude towards the house parent's pinning some butterflies on the cardboard?
    查看材料

    A．Tolerant.
    B．Unconcerned.
    C．Disgusted.
    D．Discouraged.

    答案：C
    解析：
    由文章第五段第一句“How cruel it was to kill something of such beauty．"句中“cruel”显示出作者对这种杀死蝴蝶的做法非常的厌恶。故选C。

  • 第2题：

    请阅读短文，完成第小题。
    There was a time in my life when beauty meant something special to me. I guess that would have been when ! was about six or seven years old, just several weeks or maybe a month before the orphanage(孤儿院) turned me into an old man.
    I would get up every morning at the orphanage, make my bed just like the little soldier that I had become and then I would get into one of the two straight lines and march to breakfast with the other twenty or thirty boys who also lived in my dormitory.
    After breakfast one Saturday morning I returned to the dormitory and saw the house parent chasing the beautiful monarch butterflies who lived by the hundreds in the bushes scattered around the orphanage.
    I carefully watched as he caught these beautiful creatures, one after another, and then took them from the net and then stuck straight pins through their head and wings, pinning them onto a heavy cardboard sheet.
    How cruel it was to kill something of such beauty. I had walked many times out into the bushes, all by myself, just so the butterflies could land on my head, face and hands so I could look at them up close.
    When the telephone rang the house parent laid the large cardboard paper down on the back cement (水泥) step and went inside to answer the phone. I walked up to the cardboard and looked at the one butterfly who he had just pinned to the large paper. It was still moving about so I reached down and touched it on the wing causing one of the pins to fall out. It started flying around and around trying to get away but it was still pinned by the one wing with the other straight pin. Finally its wing broke off and the butterfly fell to the ground and just trembled.
    I picked up the torn wing and the butterfly and I spat on its wing and tried to get it to stick back on so it could fly away and be free before the house parent came back. But it would not stay on him.

    Which of the following is right according to the passage?
    查看材料

    A．I found beauty meant nothing special to me.
    B．The house parent helped the children handle the quilt.
    C．The house parent chased the butterfly in order to show it to the children.
    D．I thought it cruel to catch the butterfly.

    答案：D
    解析：
    由文章第一段第一句“There was a time in my life when beauty meant something special to me．”可以排除A，由第二段“l would get up every morning at the orphanage，make my bed just like the little soldier that I had become…”可以排除B，由第四段“I carefully watched as he caught these beautiful creatures，one after another，and then took them from the net and then stuck straiight pins through their head and wings，pinning them onto a heavv cardboard sheet．”可知管理员把蝴蝶抓住从网里拿出来后直接钉在了纸板上，并不是为了给孩子们看．可以排除C。文章第五段第一句“How cruel it was to kill something of such beauty．"说明答案D正确。

  • 第3题：

    共用题干
    Narrow Escape
    We had left the hut too late that morning. When we stepped outside,the sky beyond the mountains to our east was already livid with colour. It meant the day would be a hot one,and the warmth would loosen rocks that were gripped by ice.
    As soon as we stepped out on to the face,it became obvious this was going to be an awkward route. The main problem was talus,the debris that collects on mountainsides. Talus is despised by mountaineers for two reasons. First,because it can easily be pushed off on to you by people climbing above. And second,because it makes every step you take insecure.
    For about 30 minutes we moved steadily up the face. The rock was in poor condition, shattered horizontally and mazed with cracks. When I tried to haul myself up on a block of it,it would pull out towards me,like a drawer opening. My hands became progressively wetter and colder. Then came a shout.“Cailloux!Cailloux!”I heard yelled from above,in a female voice. The words echoed down towards us. I looked up to see where they had come from.
    There were just two rocks at first,leaping and bounding down the face towards us,once cannoning off each other in mid-air. And then the air above suddenly seemed alive with falling rocks,humming through the air and filling it with noise. Crack,went each one as it leapt off the rock face,then hum-hum-hum as it moved through the air,then crack again. The pause between the cracks lengthened each time,as the rocks gained momentum and jumped further and further. I continued to gaze up at the rocks as they fell and skipped towards me. A boy who had been a few years above me at school had taught me never to look up during a rock fall.“Why?Because a rock in your face is far less pleasant than a rock on your helmet,”he told us.“Face in,always face in.”
    I heard Toby,my partner on the mountain that day,shouting at me. I looked across. He was safe beneath an overhanging canopy of rock. I could not understand him. Then I felt a thump,and was tugged backwards and round,as though somebody had clamped a heavy hand on my shoulder and turned me to face them. A rock had hit the lid of my rucksack.
    I looked up again. A rock was heading down straight towards me. Instinctively,I leant backwards and arched my back out from the rock to try to protect my chest. What about my fingers,though,I thought:they'll be crushed flat if it hits them,and I'll never get down. Then I heard a crack directly in front of me,and a tug at my trousers,and a yell from Toby. “Are you all right?That went straight through you.”The rock had pitched in front of me, and passed through the hoop of my body,between my legs,missing me but snatching at my clothing as it went.
    Toby and I had spent the evening talking through the events of the morning:What if the big final stone hadn't leapt sideways,what if I'd been knocked off,would you have held me, would I have pulled you off?A more experienced mountaineer would probably have thought nothing of it.I knew I would not forget it.

    What is likely to be the meaning of“Cailloux”?
    A: Rocks are flying through the air.
    B: Rocks are falling.
    C: There are loose rocks on the ground ahead.
    D: There are rocks everywhere.

    答案：B
    解析：
    B 本题的问题是：“Cailloux”这个词的意思是什么？由第三段后半部分与第四段开头可知 这个单词是石头滑落的意思。“it would pull towards me, like a drawer opening”“There were just two rocks at first, leaping and bounding down the face towards us, once cannoning off each other in mid-air.”

  • 第4题：

    -Give out two head lines, one from each side! -All right. Here （）.

    • A、you go
    • B、they go
    • C、I go
    • D、she go

    正确答案:A

  • 第5题：

    You are designing the forest and domain structure to meet the business and technical requirements. Which structure should you use?（）

    • A、A single forest with one tree, and one domain
    • B、A single forest with one tree two domain
    • C、A single forest with two trees, each with a single domain
    • D、Two forests, each with a single tree and a single domain
    • E、Two forests, each with two trees, with a single domain in each tree

    正确答案:A

  • 第6题：

    At a minimum how many NICs must a machine have to host virtual machines？（）

    • A、 One NIC will support all virtual machines
    • B、 One for each virtual machine and one for management
    • C、 Three for each virtual machine
    • D、 Two for each virtual machine and one for management

    正确答案:A

  • 第7题：

    You are designing a DHCP strategy to meet the business and technical requirements.  What should you do？（）

    • A、 Install one DHCP server in each branch office and one DHCP server in Los Angeles.
    • B、 Install one DHCP server in each branch office and two DHCP servers in Los Angeles.
    • C、 Install two DHCP servers in each branch office and one DHCP server in Los Angeles.
    • D、 Install two DHCP servers in each branch office and two DHCP servers in Los Angeles.

    正确答案:D

  • 第8题：

    单选题
    A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）
    A

    Two switch ports will be needed on a switch,two Ethernet cables will be needed for theserver each connecting to two different Ethernet cards,and one IP address will be needed

    B

    Two switch ports will be needed on two different switches two Ethernet cables will beneeded for the server each connecting to two different Ethernet cards,and one IP address will be needed

    C

    Two switch ports will be needed on two different switches,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,two different IP addresses will be needed

    D

    One switch port will be needed on one switch,a splitter will be needed to split the connection,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,and two different IP addresses will be needed


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    You are designing the forest and domain structure to meet the business and technical requirements.   Which structure should you use？（）
    A

     A single forest with one tree， and one domain

    B

     A single forest with one tree two domain

    C

     A single forest with two trees， each with a single domain

    D

     Two forests， each with a single tree and a single domain

    E

     Two forests， each with two trees， with a single domain in each tree.


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    One method of determining crankshaft misalignment is by（）
    A

    laying a straight edge across the crank webs at the crankpin and measuring the distance to the crankpin in two places

    B

    measuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolution

    C

    rotating the crankshaft through one revolution, pausing each 90oof rotation to measure bearing clearances, top and bottom

    D

    taking micrometer reading between the crank cheeks opposite the crankpin every 90°of crank angle rotation


    正确答案： A
    解析： 暂无解析

  • 第11题：

    多选题
    You are designing a strategy to assign the IP addresses to meet the business and technical requirement. Which two actions should you perform?（）
    A

    Install and Configure one DHCP server in Atlanta and one DHCP server in each branch office.

    B

    Install and Configure two DHCP servers in Atlanta and two DHCP servers in each branch office.

    C

    Create one scope on each DHCP server. Specify one DHCP server to always update DNS records. Configure the scope to assign half of the IP addresses available to each office.

    D

    Create two scopes on each DHCP server. Specify one DHCP server to update DNS records only for client computers that request it. Specify a second DHCP server to never update DNS records.


    正确答案： B,D
    解析： 暂无解析

  • 第12题：

    单选题
    At a minimum how many NICs must a machine have to host virtual machines？（）
    A

     One NIC will support all virtual machines

    B

     One for each virtual machine and one for management

    C

     Three for each virtual machine

    D

     Two for each virtual machine and one for management


    正确答案： C
    解析： 暂无解析

  • 第13题：

    请阅读短文，完成第小题。
    There was a time in my life when beauty meant something special to me. I guess that would have been when ! was about six or seven years old, just several weeks or maybe a month before the orphanage(孤儿院) turned me into an old man.
    I would get up every morning at the orphanage, make my bed just like the little soldier that I had become and then I would get into one of the two straight lines and march to breakfast with the other twenty or thirty boys who also lived in my dormitory.
    After breakfast one Saturday morning I returned to the dormitory and saw the house parent chasing the beautiful monarch butterflies who lived by the hundreds in the bushes scattered around the orphanage.
    I carefully watched as he caught these beautiful creatures, one after another, and then took them from the net and then stuck straight pins through their head and wings, pinning them onto a heavy cardboard sheet.
    How cruel it was to kill something of such beauty. I had walked many times out into the bushes, all by myself, just so the butterflies could land on my head, face and hands so I could look at them up close.
    When the telephone rang the house parent laid the large cardboard paper down on the back cement (水泥) step and went inside to answer the phone. I walked up to the cardboard and looked at the one butterfly who he had just pinned to the large paper. It was still moving about so I reached down and touched it on the wing causing one of the pins to fall out. It started flying around and around trying to get away but it was still pinned by the one wing with the other straight pin. Finally its wing broke off and the butterfly fell to the ground and just trembled.
    I picked up the torn wing and the butterfly and I spat on its wing and tried to get it to stick back on so it could fly away and be free before the house parent came back. But it would not stay on him.

    We know from the passage that
    查看材料

    A．the author lived alone in the dormitory
    B．there were one hundred butterflies living in the bushes
    C．the cardboard paper was left on the step so as to be watched
    D．the author failed to stick the worn wing onto the butterfly with his spit

    答案：D
    解析：
    由第二段“…with the other twenty or thirty boys who also lived in my dormitory．"可以排除A：由第三段“…saw the house parent changing the beautiful monarch butterflies who lived by the hundreds in the bushes scattered around the orphanage．"可以排除B。由第六段第一句“When the telephone rang the house parent laid the large cardboard paper down on the back cement step and went inside to answer the phone．"可以排除C。最后一段“I picked up the tom wing and the butterfly and I spat on its wing and tried to get it to stick back on so it could fly away and be free before the house parent came back．But it would not stay on him．”指出作者想在管理员回来前用唾液把蝴蝶的翅膀粘上去，但是没有成功，因此答案D正确。

  • 第14题：

    Anything to do with aeroplanes and flying 【fascinates】 him.

    A. affects B. helps C. worries D. interests

    答案：D
    解析：

  • 第15题：

    A c（） sentence contains two or more clauses， one of which is incorporated in the other.
    complex
    略

  • 第16题：

    Which statement regaming high availabily in the Cisco UCS is correct?（）

    • A、A node is one of the two（2）CMCs
    • B、A node is one of the two（2）Fabric Interconnects
    • C、A group is a set off our（4）nodes
    • D、Each group is identified by a floating node ID

    正确答案:B

  • 第17题：

    A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）

    • A、Two switch ports will be needed on a switch,two Ethernet cables will be needed for theserver each connecting to two different Ethernet cards,and one IP address will be needed
    • B、Two switch ports will be needed on two different switches two Ethernet cables will beneeded for the server each connecting to two different Ethernet cards,and one IP address will be needed
    • C、Two switch ports will be needed on two different switches,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,two different IP addresses will be needed
    • D、One switch port will be needed on one switch,a splitter will be needed to split the connection,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,and two different IP addresses will be needed

    正确答案:B

  • 第18题：

    A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）

    • A、Two switch ports will be needed on a switch， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.
    • B、Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.
    • C、Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， two different IP addresses will be needed.
    • D、One switch port will be needed on one switch， a splitter will be needed to split the connection， two ethernet cables will be needed for the server each connecting to two different Ethernet cards， and two different IP addresses will be needed.

    正确答案:B

  • 第19题：

    单选题
    Records of garbage disposal are required to be maintained （）.
    A

    until each quadrennial PSC inspection

    B

    until the end of each voyage

    C

    for a minimum of one year

    D

    for a minimum of two years


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    A customer with two x445 servers wants to have two NetXtreme Dual Port Gigabit Ethernet adapters installed in each server.  What is the minimally supported configuration that will allow maximum throughput？（）
    A

    Install the two cards in slots 5 and 6 in the x445.

    B

    Install the two cards in slots 3 and 5 in the x445 make sure slots 4 and 6 are not occupied.

    C

    Install an RXE-100 on each x445 and install one card in the x445 and one card in an RXE-100 on each system.

    D

    Connect an RXE-100 between the two x445s and install one card in each x445 and one card in each side of the RXE-100.


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    You are designing the forest and domain structure to meet the business and technical requirements. Which structure should you use?（）
    A

    A single forest with one tree, and one domain

    B

    A single forest with one tree two domain

    C

    A single forest with two trees, each with a single domain

    D

    Two forests, each with a single tree and a single domain

    E

    Two forests, each with two trees, with a single domain in each tree


    正确答案： E
    解析： 暂无解析

  • 第22题：

    填空题
    A c（） sentence contains two or more clauses， one of which is incorporated in the other.

    正确答案： complex
    解析： 暂无解析

  • 第23题：

    单选题
    A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）
    A

    Two switch ports will be needed on a switch， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.

    B

    Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.

    C

    Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， two different IP addresses will be needed.

    D

    One switch port will be needed on one switch， a splitter will be needed to split the connection， two ethernet cables will be needed for the server each connecting to two different Ethernet cards， and two different IP addresses will be needed.


    正确答案： B
    解析： 暂无解析

  • 第24题：

    单选题
    Two aeroplanes are flying straight towards each other. One is traveling at 10 kilometres per minute, and the other at 15 kilometres per minute. Assuming that the planes are exactly 1,000 kilometres apart, what distance will be between them one minute before they crash into each other?
    A

    . 10 kilometers.

    B

    15 kilometers.

    C

    25 kilometers.

    D

    5 kilometers.


    正确答案： A
    解析：
    两架飞机相向飞行，一架飞行速度每分钟10公里，另一架每分钟15公里，那么如果相撞，相撞前一分钟时两架飞机的距离应该是10+15=25公里。选项C正确。

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