皮皮学，免费搜题
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搜题
【单选题】
属4级致畸物的是A.
已确定人类母体接触后可引起子代先天性缺陷
B.
对动物肯定致畸，但对人类致畸作用尚未确定因果关系
C.
动物试验结果肯定致畸，但无人类致畸资料
D.
尚无结论性肯定致畸证据或资料不足
E.
动物试验阴性，人群中调查结果未发现致畸
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【单选题】We ________ see a horse carriage now because almost all people use cars or buses.
A.
merely
B.
rarely
C.
frequently
D.
invariably
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【单选题】听力原文：(A) The people are getting off the buses. (B) The buses are on a city street. (C) The people are waiting for the bus to come. (D) The buses are approaching the bus stop.
A.
B.
C.
【简答题】苏宁电器通过互联网从海尔集团购进一批电器,该类电子商务是( )
【简答题】完成一条指令分 4 个工作周期取指周期、_____、执行周期和_______。
【简答题】任务型阅读。 People often complain (抱怨) about buses in Shanghai. The dirty smoke from the buses pollute our city. Buses are always full of (1) and it's (2) to get a seat. (2) 有时人们得等很长时间 , but the bus doesn'...
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