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【单选题】
用万用表测量起动机接柱和绝缘电刷之间的电阻为无穷大，则说明( )，存在断路故障。A.
电枢绕组
B.
磁场绕组
C.
吸拉线圈
D.
保持线圈
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【多选题】There are two main types of stocks: ______
A.
common stocks
B.
paper stock
C.
preferred stocks
D.
electronic stock
【简答题】With fish stocks under threat, to feed our appetite in the future, we are going to _______________as well as our favorite cod fish.
【单选题】What percentage of the worlds important fish stocks is already over-exploited, according to the man?
A.
At least 30%.
B.
At least 50%.
C.
At least 70%.
D.
At least 90%.
【单选题】(2017初赛第三场 suggested completion time: 5 minutes)The line chart shows the proportion of fish stocks within their safe biological limits from 1974 to 2011 and fish landings from 1970 to 2013. Choose the...
A.
The period from 1990 to 2013 has witnessed the rise of the total marine catch brought ashore globally.
B.
The percentage of fish stocks that remain within safe biological limits has been falling over time.
C.
The chart demonstrates that the global fish catch has an impact on the productivity of fish stocks
D.
Starting from 1985, fish stocks have been below the level at which they can produce maximum sustainable yields.
【判断题】Fish farming is energy efficent and can reduce the presure of wild fish stocks.
A.
正确
B.
错误
【单选题】Jeff Bewkes compared CEOs to some stocks in that ______.
A.
CEOs often own stocks of their companies
B.
CEOs can influence the industry like Some stocks
C.
CEOs are rising and falling like some stocks
D.
CEOs are controlling companies' fate like some stocks
【单选题】Declining fish stocks in the oceans is a global issue. ( )
A.
specificity
B.
emphasis
C.
time
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