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【单选题】
氨基酸活化需要消耗:( )
A.
UTP
B.
GTP
C.
2个高能磷酸键
D.
1个高能磷酸键
E.
4个高能磷酸键
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举一反三
【简答题】切击式水轮机主要组成有哪些?简要说明各组成部分的作用? 2、简要陈述中国水资源的特点。
【判断题】压力取源部件在焊接时起压管内端不应超出设备或管道的内壁,取压口要求,无毛刺无焊瘤
A.
正确
B.
错误
【单选题】Talks between the two countries______ when the two sides failed to reach an agreement.
A.
made a living by
B.
searched for
C.
broke down
D.
were better off
【简答题】accommodation compelled pillars flourish vivid tolerance applied precede persist hierarchical segment calculate bound philosopher flo...
【简答题】根据句意及首字母提示补全单词。 1. With the d_____ of China, all the children can go to school. 2. The two sides failed to reach a_____. 3. Some spaceships have gone b_____ the solar system. 4. We are here to p_____ ...
【简答题】Fill in the blank with a proper word. Change the form where necessary. erect segment accommodation bound philosopher compelled dominant barriers sector disc...
【单选题】The two sides failed to agree _________ every point but came to an accommodation.
A.
with
B.
on
C.
to
D.
that
【单选题】The two sides failed to agree on every point, but they settled on a(n) ________for their differences.
A.
weapon
B.
auction
C.
accommodation
D.
segment
【单选题】在 [Cu(en)2]2+离子中,铜离子的价态和配位数分别是(其中 en 代表乙二胺 H2N-CH2-CH2-NH2) (1) 0 和 4 (2) +2 和 2(3) +2 和 8 (4) +2 和 4
A.
(1)
B.
(2)
C.
(3)
D.
(4)
【简答题】已知:-CHO+(C 6 H 5 ) 3 P=CH-R→-CH=CH-R + (C 6 H 5 ) 3 P=O,R代表原子或原子团是一种有机合成中间体,结构简式为:HOOC-CH=CH-CH=CH-COOH,其合成方法如下: 其中, 分别代表一种有机物,合成过程中其他产物和反应条件已略去。 X与W在一定条件下反应可以生成酯N,N的相对分子质量为168。 请回答下列问题: (1)W能发生反应的类型有...
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