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【单选题】
现有资源不能充分满足人们的欲望这一事实被称为:A.
经济物品
B.
资源的稀缺性
C.
机会成本
D.
人类欲望的无穷性
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举一反三
【单选题】What’s the ________ with you? You look very pale.?
A.
matter
B.
wrong
C.
happen
D.
up
【多选题】双母线接线的特点有哪些
A.
可轮流检修母线而不影响正常供电
B.
检修任一母线侧隔离开关时,不影响该回路供电
C.
工作母线发生故障后,所有回路短时停电并能迅速恢复供电
D.
可利用母联断路器替代引出线断路器工作
【单选题】—Is there anything wrong with you, Jake? You look so pale． —I feel very tired．I _____on this boring paper every day so far this month．
A.
work
B.
have been working
C.
had been working
D.
am working
【单选题】在变电站或发电厂的设计中，作为载流导体的钢母线适用下列哪种场合?
A.
持续工作电流较大的场合
B.
对铝有严重腐蚀的场合
C.
额定电流小而短路电动力大的场合
D.
大型发电机出线端部
【简答题】A．They are very cute. B．They are disciplined. C．They are self-controlling. D．They are impulsive.
【单选题】一患者右眼眼镜处方在角膜顶点距离为14mm时为-6.50DS/-3.00DC×170,现决定配 戴散光软镜,除考虑散光软镜在眼内旋转因素外,下述( )为最后接触镜处方度数。
A.
-6.00DS/-2.50DC×160
B.
-6.00DS/-3.00DC×180
C.
-6.50DS/-2.50DC×180
D.
-6.50DS/-3.00DC×160
【单选题】听力原文：W: You don't feel very well, do you? You look pale. Have you got a cold? M: Oh, no, but my stomach aches. Maybe the seafood doesn't agree with me. What probably caused the man's stomach-ache?
A.
The pear.
B.
The sea food.
C.
The weather.
D.
The cold.
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