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【单选题】
下列关于有机化合物的说法正确的是A.
2- 甲基丁烷也称为异丁烷
B.
由乙烯生成乙醇属于加成反应
C.
C 4 H 9 Cl 有 3 种同分异构体
D.
油脂和蛋白质都属于高分子化合物
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【单选题】阿托品用于抢救有机磷酸酯类中毒时不会出现的作用是
A.
缓解支气管痉挛
B.
减少支气管腺体分泌和唾液分泌
C.
降低胃肠道平滑肌兴奋性
D.
复活胆碱酯酶
E.
心率变快
【单选题】There has been housing development on a massive ________ since 1980.
A.
range
B.
scale
C.
degree
D.
level
【简答题】机车信号是通过设在 的信号装置
【简答题】机车信号是通过设在 的信号装置，自动反映运行条件，指示司机运行的信号显示制度。A. 机车司机室
【简答题】A．No sufficient security has been provided to the witnesses and lawyers. B．Not every defendant has been offered an attorney. C．Some lawyers threatened to boycott the trial. D．Saddam Hussein refused to...
【简答题】The island where these rare birds nest has been declared a _____. A. observation B. reservation C. preservation D. conservation
【单选题】The destruction of rainforests has been_____as a disaster for the environment.
A.
blamed
B.
declared
C.
condemned
D.
appealed
【单选题】______ in the earthquake thoroughly, the city has now been rebuilt.
A.
Destroying
B.
Having destroyed
C.
Destroyed
D.
To be destroyed
【简答题】A professor I have worked pretty closely with has been diagnosed with Stage 4 cancer. It has been devastating(悲惨的) for his family and heartbreaking for his students. What made him extraordinary was no...
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