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【单选题】
有机化学实验中利用 Perkin 反应制备的化合物是:肉桂酸、肉桂醛、肉桂醇?A.
肉桂酸
B.
肉桂醛
C.
肉桂醇
D.
肉桂烯
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【单选题】Last Sunday I climbed to the top of the hill near my home, I could see half of the city. A．that B
A.
Last Sunday I climbed to the top of the hill near my home, ____I could see half of the city. A．that
B.
where
C.
which
D.
there
【单选题】Last Sunday I climbed to the top of the hill near my home, ______ I could see half of the city.
A.
that
B.
where
C.
which
D.
there
【单选题】项目管理是通过( )和( ) 两个环节,使项目的总目标得以 实现。
A.
项目计划、项目实施
B.
项目计划、项目检查
C.
项目策划、项目控制
D.
项目控制、项目改造
【单选题】I when I was not at home.I don’t know the hedge. [ ]
A.
was climbing;what happened to
B.
climbed;how happened to
C.
was climbing;what happens
D.
climbed;what happened
【单选题】.I’ll never forget the mountain_______I climbed with my dad last year.
A.
which
B.
who
C.
where
D.
when
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