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【单选题】
有机化合物 X ( HOCH 2 CH = CHCH 2 OH )主要用于杀虫剂、农业化学品和维生素 B 6 的中间体。关于 X 的下列说法不正 确 的是A.
存在顺反异构
B.
可发生加成、取代、加聚反应
C.
熔沸点低于 CH 3 CH ＝ CHCH 3
D.
核磁共振氢谱有 3 种类型氢原子吸收峰
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举一反三
【单选题】Look into people’s eyes and smile when you ______________ hands with them.
A.
checked
B.
feel proud of
C.
pattern
D.
request
E.
shake
【单选题】It's important for us to old and young people. [ ]
A.
look at
B.
look up
C.
look for
D.
look after
【单选题】It’s not right to ______ the poorer people of the world.
A.
look up
B.
look down
C.
look down on
D.
look up to
【简答题】按可燃物性质不同，把火灾分为A类火灾；B类火灾；C类火灾和D类火灾。其中A类火灾是指（）火灾，B类火灾是发生在（）的火灾，C类火灾是发生在电气设备及其附近的火灾，D类火灾是发生在可燃金属表面的火灾。
【简答题】People look up word in it.
【单选题】It's wrong of us to ________ deaf people. [ ]
A.
look after
B.
look down on
C.
look for
D.
look at
【简答题】完形填空。 Mr. Smith is our English teacher. He is about 1.76 meters 1 . He has black hair and two big 2 . He works very hard in the school. Every student likes him very much. He gets up early every day. T...
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