_________A.At first B.At last C.At once D.At least
题目
B.At last
C.At once
D.At least
相似考题
参考答案和解析
更多“_________A.At first B.At last C.At once D.At least”相关问题
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第1题：
常见的机箱从结构上可以分为().A.立式结构和卧式结构
B.AT结构和ATX结构
C.AT、ATX、NLX
D.ATX和卧式
参考答案：B
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第2题：
从主板结构上来说，主板可以分为两种()。
A.AT主板和ATX主板
B.TA主板和XTA主板
C.AT主板和ATN主板
D.TA主板和NTA主板
正确答案：A
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第3题：
电源同样也有()结构之分。A.立式和卧式
B.AT和ATX
C.微型和中型
D.AT和ATX
参考答案：B
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第4题：
用频谱多普勒测肺动脉高压的肺动脉血流的特点
A.血流加速时间及射血时间延长(AT,ET)，射血前时间延长(PEP)
B.AT,PEP延长，ET缩短
C.AT,E.T缩短，PEP延长
D.AT,ET,PEP均缩短
E.AT和ET无变化，PEP延长
本题答案：C, D
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第5题：
A carbon dioxide fire extinguisher should be recharged ______.
A.at least annually
B.whenever it is below its required weight
C.only if the extinguisher has been used
D.before every safety inspection
正确答案：B
二氧化碳灭火器一般重量减少百分之十必须从新填装。 -
第6题：
The CEO of the company has been consistent ________ his policy associated with foreign investments over the last few years.A.of
B.with
C.at
D.for答案：B解析： -
第7题：
“Calling once，calling twice，last calling”（翻译）（）。
正确答案:第一次，第二次，最后一次 -
第8题：
栈的特性是后进先出又称为LIFO表，那么后进先出的英文是（）。
- A、First In Last Out
- B、First In First Out
- C、Last In Last Out
- D、Last In First Out
正确答案:D -
第9题：
A data center has had a power outage. Which of the following should the administrator do FIRST once the power is restored？ （）
- A、 Identify which systems are the most critical and bring them up by level of importance.
- B、 Retrieve the latest backup tapes for immediate system restore using the GFS rotation.
- C、 Identify the least critical systems and then power those systems on first.
- D、 Determine the cause of the power outage and install UPS systems to prevent its reoccurrence.
正确答案:A -
第10题：
单选题How long must the GMDSS radio log be retained on board?（）AAt least two years after the last entry
BAt least one year after the last entry
CAt least 90 days after the last entry
DAt least 30 days after the last entry
正确答案： D解析： 暂无解析 -
第11题：
填空题“Calling once，calling twice，last calling”（翻译）（）。正确答案： 第一次，第二次，最后一次解析： 暂无解析 -
第12题：
单选题Which is the proper method of determining whether a portable CO2 fire extinguisher needs recharging?（）ACheck the tag to see when the extinguisher was last charged
BRelease a small amount of CO2; if the CO2 discharges，the extinguisher is acceptable
CWeigh the extinguisher and compare the weight against that stamped on the valve
DRecharge the extinguisher at least once each year
正确答案： A解析： 暂无解析 -
第13题：
按照鼠标的接口来分,可分为三种()A.AT接口和PS/2接口和USB口
B.串口、PS/2口以及USB口
C.AT接口和PS/2接口和串口
D.串口、AT接口以及USB口
参考答案：B
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第14题：
选择一个适当的句子放在②处_______
A. First impressions last longest.
B. Everyone was new to the network once.
C. The internet has opened up a whole new world for us.
D. Even if you feel strongly about it, think twice before saying anything.
正确答案：B
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第15题：
从主板结构上来说,可以分为()两种。A.AT主板和ATX主板
B.AT主板和XTA主板
C.AT主板和ATN主板
D.TA主板和NTA主板
参考答案：A
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第16题：
How long must the GMDSS radio log be retained on board ________．
A.At least two years after the last entry
B.At least one year after the last entry
C.At least 90 days after the last entry
D.At least 30 days after the last entry
正确答案：D
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第17题：
A channel is started as having a controlling depth of 38 feet. Which statement is TRUE?_____
A.At least 80% of the channel is cleared to the charted depth.
B.At least 50% of the channel is cleared to the charted depth.
C.100% of the channel depth is clear to 38 feet.
D.The sides of the channel conform to at least 50% of the controlling depth.
正确答案：C
航道被标注为38英尺的限制水深，则水道百分之百都拥有38英尺的水深。 -
第18题：
关于抗凝血酶(AT)的临床意义，正确的是A.AT活性增高为异常，活性减低无临床意义
B.AT活性减低为异常，增高无临床意义
C.AT活性增高或减低，均可导致出血
D.AT活性增高可导致出血，减低导致血栓形成
E.AT活性减低可导致出血，增高可导致血栓形成答案：D解析：AT为体内主要的抗凝蛋白，因而其增高可导致出血，减低可导致血栓形成。 -
第19题：
您要对EMPLOYEES表的FIRST_NAME和LAST_NAME列创建一个组合索引。以下哪条语句将完成此任务（）
- A、CREATE INDEXfl_idx ON employees（first_name last_name）
- B、CREATE INDEXfl_idx ON employees（first_name），employees（last_name）
- C、CREATE INDEXfl_idx ON employees（first_name，last_name）
- D、CREATE INDEXfl_idx ON employees（first_name）；CREATE INDEXfl_idx ON employees（last_name）
正确答案:C -
第20题：
数据结构里，先进先出是队列的特性，其英文是（）。
- A、First In First Out
- B、Last In First Out
- C、Last In last Out
- D、都不对
正确答案:A -
第21题：
Examine the structure of the EMPLOYEES table: Column name Data type Remarks EMPLOYEE_ID NUMBER NOT NULL, Primary Key LAST_NAME VARCNAR2(30) FIRST_NAME VARCNAR2(30) JOB_ID NUMBER SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER You need to create an index called NAME_IDX on the first name and last name fields of the EMPLOYEES table. Which SQL statement would you use to perform this task? （）
- A、CREATE INDEX NAME _IDX (first_name, last_name);
- B、CREATE INDEX NAME _IDX (first_name, AND last_name)
- C、CREATE INDEX NAME_IDX ON (First_name, last_name);
- D、CREATE INDEX NAME_IDX ON employees (First_name, AND last_name);
- E、CREATE INDEX NAME_IDX ON employees (First_name, last_name);
- F、CREATE INDEX NAME_IDX FOR employees (First_name, last_name);
正确答案:E -
第22题：
问答题You are looking for one word in this paragraph. The word appears only once, its first letter is the eighth letter which appears after a certain vowel and the same vowel is the fifth letter before its last letter.正确答案： paragraph解析：
paragraph这个单词在本段中只出现过一次，它的第一个字母和第八个字母都是P，字母P前是元音A，且A也是最后一个字母H前面第五个字母。 -
第23题：
单选题If your passenger vessel is fitted with a loudspeaker system，it must be tested at least once （）.Aevery week
Ba day
Cevery trip
Da watch or once a trip，whichever is shorter
正确答案： B解析： 暂无解析