单选题A 10-gallon bucket loses 2 gallons of water every 10 minutes. How many minutes will it take a fu U bucket to empty completely?A 20B 22C 40D 50E 100

题目
单选题
A 10-gallon bucket loses 2 gallons of water every 10 minutes. How many minutes will it take a fu U bucket to empty completely?
A

20

B

22

C

40

D

50

E

100


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更多“单选题A 10-gallon bucket loses 2 gallons of water every 10 minutes. How many minutes will it take a fu U bucket to empty completely?A 20B 22C 40D 50E 100”相关问题
  • 第1题:

    OSS控制台支持哪些功能?()

    • A、bucket所在地域。
    • B、创建时间。
    • C、对于bucket操作。
    • D、bucket列表。

    正确答案:A,B,C,D

  • 第2题:

    阿里云对象存储OSS的Bucket不支持重命名。如果有变更Bucket名称的需求,可以先创建一个新的Bucket,然后用COPYObject的方式将原Bucket下的文件复制到新Bucket


    正确答案:正确

  • 第3题:

    肝素的半衰期为0.5-2小时,平均()分钟。

    • A、20
    • B、30
    • C、40
    • D、50
    • E、60

    正确答案:D

  • 第4题:

    Bucket的拥有者可以通过OSS控制台为其所拥有的Bucket开启访问日志记录功能,OSS用户需要手动保存访问日志纪录。


    正确答案:错误

  • 第5题:

    开通阿里云对象存储OSS服务后,您首先需要使用OSS管理控制台或OpenAPI创建Bucket来存储文件。创建Bucket时“所属地域”这个属性必须要指定,特别是您的云服务器ECS实例需要通过内网访问OSSBucket时,必须选择与ECS实例相同的地域,以下有关“所属地域”的说法()是正确的

    • A、Bucket创建后,如果未上传任何文件,则“所属地域”属性可以更改
    • B、Bucket创建后,要想修改“所属地域”属性,需申请特殊权限
    • C、Bucket创建后,“所属地域”属性可随时更改
    • D、Bucket创建后,“所属地域”属性不可更改

    正确答案:D

  • 第6题:

    单选题
    _____
    A

    About every four minutes.

    B

    About every five minutes.

    C

    About every six minutes.

    D

    About every seven minutes.


    正确答案: C
    解析:
    该题是数字题,提问频率。由“every 6 minutes”可知,火车每六分钟一趟。
    【录音原文】
    M: Excuse me, I’d like to go to the science museum, but I don’t know how to use this ticket machine.
    W: Well, just press this button. It’s two dollars.
    M: Thanks.
    W: The train is coming soon. Please wait a moment.
    M: All right. How often do the trains come at this time of the day?
    W: Usually they come about every 6 minutes.
    M: Ok. And where should I get off?
    W: Just get off at the science museum station. That’s five stops from here.
    M: I’ve got it! Thanks for your help.
    W: You’re welcome!
    Q6: Where does the man want to go?
    Q7: How often do the trains come at this time of the day?

  • 第7题:

    单选题
    A swimming pool with a capacity of 20,000 gallons is one-quarter full. A pump can deliver g gallons of water every m minutes. If a company charges d dollars per minute for the use of the pump, then in terms of g, m, and d, how much will it cost, in dollars, to fill the pool?
    A

    15,000gd/m

    B

    15,000gmd

    C

    15,000md/g

    D

    gd/(15000m)

    E

    gm/(15000d)


    正确答案: C
    解析:
    如果当这个游泳池能装20,000加仑水,现在还有四分之三体积未装满,那么装满这个游泳池,还需要(3/4) ×20,000=15,000加仑水。抽水泵每分钟g加仑水需支付d美元,那么每加仑水m分钟需要钱为md/g,那么15000加仑水则为15,000md/g。

  • 第8题:

    问答题
    An employee at a company was given the task of making a large number of copies. He spent the first 45 minutes making copies at a constant rate on copier A, but copier A broke down before the task was completed. He then spent the next 30 minutes finishing the task on copier B, which also produced copies at a constant rate. How many total minutes would the task hare taken had copier A not broken down?  (1) Copier A produced twice as many copies in its first 5 minutes of operation as copier B produced in its first 15 minutes.  (2) Copier B produces 10 copies per minute.

    正确答案: A
    解析:
    通过计算可知,条件1可以确定完成工作的时间,条件2不能确定,故本题应选A项。

  • 第9题:

    单选题
    A local newspaper company prints 520 pages of the newspaper every 30 minutes. How many pages will it print in 5 hours?
    A

    2,600 pages

    B

    86.7 pages

    C

    5,200 pages

    D

    10,400 pages

    E

    1,300 pages


    正确答案: A
    解析:
    Let p = the number of pages printed in 5 hours. Set up a proportion to solve for p, remembering to use consistent units for time (either minutes or hours). Let’s change 30 minutes to 0.5 hours. 520/0.5=p/5, p=5.200pages.

  • 第10题:

    问答题
    You are trying to fill a bath with both taps on, but have accidentally left out the plug. Normally the hot water tap takes 8 minutes to fill the bath and the cold water tap takes 10 minutes. However, the water empties out through the plug hole in 5 minutes. How long will it take for the bath to fill?

    正确答案: 40 minutes.
    解析:
    设浴缸容量为x,n为三管一起开的充满水的时间,热水充满浴缸要8分钟,所以每分钟充满x/8,同理冷水每分钟充满x/10,而放水管每分钟放水x/5,故可列方程(x/8+x/10-x/5)×n=x,解得n=40,即需40分钟。

  • 第11题:

    ( 难度:中等)在 OSS 中,只有该 Bucket 的创建者可以对_____权限的 Bucket 内的文件进行读写操作; 其他人无法访问该 Bucket 内文件。
    A.公共读写
    B.公共写
    C.公共读
    D.私有

    答案:D

  • 第12题:

    ( 难度:中等)开通沃云A对象存储OSS服务后,您首先需要使用OSS管理控制台或OpenAPI创建Bucket来存储文件。创建Bucket时“所属地域”这个属性必须要指定, 特别是当云服务器ECS实例需要通过内网访问OSS Bucket时,必须选择与 ECS实例相同的地域,以下有关“所属地域”的说法正确的是:
    A.Bucket创建后,如果未上传任何文件,则“所属地域”属性可以更改
    B.Bucket创建后,要想修改“所属地域”属性,需申请特殊权限
    C.Bucket创建后,“所属地域”属性可随时更改
    D.Bucket创建后,“所属地域”属性不可更改

    答案:D

  • 第13题:

    阿里云对象存储OSS里存储的所有文件必须隶属于某个存储空间Bucket,当一个用户创建了多个Bucket,每个Bucket为不同的应用服务时,最安全的方法是让每个应用只能访问对应的Bucket。阿里云的OSS与访问控制RAM配合可以满足此类业务需求。OSS配合RAM的方案描述正确的是()

    • A、不同的应用访问不同的Bucket,但是权限只有“允许”和“拒绝”,不区分“读”和“写”
    • B、开发环境和正式线上环境中的应用使用不同的Bucket
    • C、允许某个应用读,另一个应用写同一个Bucket里的文件
    • D、让某个应用临时读写某个Bucket,凭证过期后无法访问

    正确答案:B,C,D

  • 第14题:

    ()mineral water is there in the bottle?

    • A、How much
    • B、How little
    • C、How many

    正确答案:A

  • 第15题:

    阿里云对象存储OSS是阿里云提供的海量、安全、低成本、高可靠的云存储服务。在OSS里存储文件前首先要创建一个存储空间Bucket,之后才能在Bucket中进行文件的上传和管理。以下有关Bucket的描述中正确的包括()。

    • A、同一个Bucket内部的空间是扁平的,所有的对象都是直接隶属于其对应的Bucket
    • B、每个用户可以拥有多个Bucket
    • C、Bucket的名称在OSS范围内必须是全局唯一的,一旦创建之后无法修改
    • D、Bucket在创建时需要指定容量上限

    正确答案:A,B,C

  • 第16题:

    开通阿里云对象存储OSS服务后,您首先需要使用OSS管理控制台或OpenAPI创建存储空间Bucket以用来存储文件,以下有关Bucket的说法()_是正确的

    • A、Bucket的名称要求全局唯一,创建后支持更改
    • B、Bucket的名称要求全局唯一,且创建后不支持更改
    • C、Bucket的名称只要求在本帐号内唯一,创建后支持更改
    • D、Bucket的名称要求在本帐号内唯一,且创建后不支持更改

    正确答案:B

  • 第17题:

    问答题
    How many minutes before midnight is it if one hour ago it was five times as many minutes past 9 pm?

    正确答案: 20 minutes
    解析:
    晚9点与午夜12点之间相差3小时,3小时减去1小时为2小时,把2小时平分为6份,可得20分钟。

  • 第18题:

    问答题
    If two typists can type two pages in two minutes, how many typists will it take to type 18 pages in six minutes?

    正确答案: 6
    解析:
    One typist types one page in two minutes.

  • 第19题:

    问答题
    How many minutes is it before 12 noon if 90 minutes ago it was four times as many minutes past 9 am?

    正确答案: 72
    解析:
    设是中午12点以前x分钟。根据题意可得此方程式:
    x=4[12×60-(90+x)-9×60]
    解得x=72

  • 第20题:

    单选题
    How long does the TV play Sisters last?
    A

    30 minutes.

    B

    55 minutes.

    C

    90 minutes.


    正确答案: B
    解析:
    由节目单可以看出1频道从20:05至21:00播出电视剧:姐妹。

  • 第21题:

    单选题
    John: I want to go to Chicago. When is the next train, please?  Booking clerk: In fifteen minutes.  John: How much is the fare?  Clerk: You want to buy a single fare or a round trip ticket?  John: ______  Clerk: A round trip ticket saves you about 10% of the fare.
    A

    Will it take me straight there?

    B

    How much is it?

    C

    What’s the difference?

    D

    What is the fare?


    正确答案: A
    解析:
    由Clerk的回答可知,John应该是在问这两种票有什么区别,所以C选项符合题意。

  • 第22题:

    单选题
    A rectangular fish tank has a base 2 feet wide and 3 feet long. When the tank is partially filled with water, a solid cube with an edge length of 1 foot is placed in the tank. If no overflow of water from the tank is assumed, by how many inches will the level of the water in the tank rise when the cube becomes completely submerged?
    A

    1/6

    B

    1/2

    C

    2

    D

    3

    E

    4


    正确答案: C
    解析:
    When a solid cube with an edge length of 1 foot is placed in the fish tank, it displaces a volume of water that is equal to the volume of the cube, which is 1×1×1 or 1 cubic foot. If h represents the change in the number of feet in the height of the water in the fish tank, then
    Volume of displaced water = 2×3 ×h = 1
    h = 1/6 foot
    Hence, the number of inches the level of the water in the tank will rise is 1/6 ×12 or 2.

  • 第23题:

    ( 难度:中等)沃云A对象存储OSS为用户提供保存访问日志记录的功能。Bucket的拥有者可以通过OSS管理控制台,为其所拥有的Bucket开启访问日志记录功能。当一个Bucket A开启访问日志记录功能后,OSS自动将访问这个Bucket的请求日志,以小时为单位,按照固定的命名规则,生成一个Object写入用户指定的Bucket B。以下关于OSS日志记录说法正确的是:
    A.Bucket A和Bucket B可以属于不同的用户
    B.Bucket A和Bucket B可以是同一个Bucket,也可以是不同的Bucket,但必须属于同一个用户
    C.Bucket A和Bucket B必须是同一个Bucket
    D.Bucket A和Bucket B必须是不同的Bucket

    答案:B