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【单选题】
不属于卤代烃的是A.
甲烷
B.
溴乙烷
C.
溴苯
D.
三氯甲烷
E.
四氯化碳
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反馈参考答案：
举一反三
【单选题】以下属于颈动脉窦和主动脉弓压力感受性反射传入神经的是
A.
交感神经和窦神经
B.
窦神经和主动脉神经
C.
交感神经和迷走神经
D.
主动脉神经和交感神经
E.
交感缩血管神经和迷走神经
【单选题】The last sentence in the first paragraph, 'Mayoral knew no one who had been close to a healthy gray whale and lived' means ______.
A.
nobody had ever approached a living whale
B.
among his friends no one saw any whale that was still alive
C.
no one he knew had ever touched a living whale
D.
whales would cat up anyone they catch without exception
【简答题】在关系模型中,现实世界的实体以及实体间的各种联系均用单一的结构类型________来表示。
【单选题】In the first ,no one got two-thirds of the vote. So the voting continued.
A.
ball
B.
ballet
C.
ballot
D.
bald
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