Which of the following phrases in the fifth paragraph indicates the fridge's negative effect on the environment
A. "Hum away continuously".
B. "Climatically almost unnecessary".
C. "Artificially - cooled space".
D. "With mild temperatures".
查看答案
The first volume was published（）
A. ten years ago
B. last year
C. five years ago
D. twenty years ago
应当交付1000公斤苹果，一次不能凑齐，而只能交付950公斤，此时债权人并不因此而遭受损失的，则其拒绝受领有悖于( )
A. 合同自由原则
B. 诚实信用原则
C. 合法原则
D. 公平原则
为了保证偏转线圈使电子束作重复性摆动和偏移，偏转线圈的磁芯可选用高频特性好的材料、在偏转频率高于10kHz时，应采用( )偏转线圈。
A. 实芯
B. 圆芯
C. 空芯
D. 方芯
What does the Writer think about machines with human - like ability
A. He believes they will be useful to human beings.
B. He believes that they will control us in the future.
C. He is not quite sure in what way they may influence us.
D. He doesn't consider the construction of such machines possible.
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