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【单选题】
恶性疟患者发作时采血检查，此时血片中最易查到疟原虫的哪一阶段 ( )A.
环状体
B.
大滋养体
C.
裂殖体
D.
雌配子体
E.
雄配子体
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【单选题】With the depletion of the cod fishery and so many other coastal fish stocks worldwide, the fishing industry has turned to the high seas to exploit their resources. Fishing operations are now (1)_____ ...
A.
pointing
B.
intending
C.
targeting
D.
aiming
【多选题】、三相笼型异步电动机 Y- Δ起动电路,采用时间控制原则控制起动的过程,通常使用时间继电器的( )触点
A.
常开延时闭合
B.
常闭延时闭合
C.
常开延时断开
D.
常闭延时断开
【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
【简答题】举例说明连锁阻断型抗氧剂、防护型抗氧剂及光稳定剂,写出作用机理
【单选题】Declining fish stocks in the oceans is a global issue. ( )
A.
specificity
B.
emphasis
C.
time
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