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【单选题】
信息收集的方法包括:A.
文献收集法
B.
实物收集法
C.
实验收集法
D.
现场调查法
E.
以上都是
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【简答题】三个连续奇数的和是21，则它们的积是（ ）。
【单选题】Checks and balances system Checks and balances system was based on division of powers. Congress is the Legislative branch. It consists of two chambers: the Senate and the House of Representatives.The ...
A.
executive
B.
legislative
C.
judicial
D.
supreme
【单选题】Which of the following statements concerning testing and maintenance of SARTs is true?
A.
An at-sea GMDSS maintainer is not able to test a SART as it is hermetically sealed.
B.
Testing a SART should be performed only in controlled environment as a test signal may be misinterpreted as a genuine distress situation.
C.
A SART's battery must be replaced within ninety (90) days after the expiration date imprinted on the unit.
D.
A SART's battery must be replaced within sixty (60) days after the expiration date im printed on the unit.
【简答题】两个连续奇数的和是60，这两个奇数的积是多少？
【单选题】I’m disappointed with the new officers elected in our club, but there is no point _____ about it. A. to worry B. in worrying C. with us worrying D. if we worry
A.
to worry
B.
in worrying
C.
with us worrying
D.
if we worry
【简答题】三个连续奇数的和是21，则它们的积是______．
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