The passage states that before the blue square appeared, the person in the video ______.
A. was in a relaxed state
B. watched the screen closely
C. wondered what would happen
D. got ready to respond to a shock
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Now is the time to ______ on our strong position in the major Southeast Asian markets.
A. introduce
B. capitalize
C. invest
D. administer
If we want to feed the world's population in 2050, our food production needs ______.
A. to increase by 30 percent
B. an increase of 300 percent
C. to increase to 3 billion tons per year
D. an increase of three times
It can be inferred from the passage that ______.
A. it is estimated that there will be no food produced by conventional agriculture
B. people haven't been aware of the health benefits of reduced pesticide use
C. a genetic revolution will be one of methods to increase food supplies
D. GM food will be too expensive for people to accept
已知船在静水中的速度为28km/h，水流的速度为2km/h，则此船在相距78km的两地间往返一次所需时间是（）
A. 5.9h
B. 5.6h
C. 5.4h
D. 4.4h
E. 4h
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