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【单选题】
下列化合物 1苯甲酸 2对 甲 基苯甲酸 3对 硝基苯甲酸 4 2 , 4- 二硝基苯甲酸发生硝化反应活性强弱的是( )。A.
④ > ③ > ① > ②
B.
② > ① > ③ > ④
C.
④ > ① > ③ > ②
D.
④ > ③ > ② > ①
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】景物制作通常需要四类材料:结构材料、连接材料、塑形材料、( )。
【单选题】Fortunately somebody who happened to be passing by called the emergency aid the traffic accident occurred.
A.
hurriedly
B.
quickly
C.
immediately
D.
shortly
【简答题】In the traffic accident, his father came closeto_______ A. bekilled B. being killed C.kill D.killing
【单选题】如图 耦合电感,当 b 和 c 连接时,其 L a d = 0.2H ,当 b 和 d 连接时, L a c = 0.6H ,则互感 M 为 ( )
A.
0.1H
B.
0.4 H
C.
0.2 H
D.
0.8 H
【单选题】___the survivors in the traffic accident appreciated the police before they left for their homes.
A.
The most of
B.
Most
C.
The majority of
D.
The majority
【单选题】The question of ______ the traffic accident happened hasn't been answered yet, though the police have made on-the-spot investigation.
A.
that
B.
whether
C.
how
D.
whenever
【简答题】C______ was the cause of the traffic accident.
【单选题】The mother who lost her son insisted that the careless driver for the traffic accident ___ yesterday .
A.
was to blame ; happening
B.
be to blame ; happened
C.
be blamed ; was happened
D.
was to blame; had happened
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