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【多选题】
2,2- 双 (4- 羟基 -3,5- 二溴苯基 ) 丙烷又称四溴双酚 A ,构造式如下所示。它既是添加型也是反应型阻燃剂,可用于抗冲击聚苯乙烯、 ABS 树脂和酚醛树脂等。试由苯酚及必要的原料合成之 四溴双酚 A,下列反应、试剂和中间体正确的是( ) 。
A.
硫酸
B.
乙酸
C.
液溴，溴化反应
D.
丙酮
E.
烷基化
F.
NBS
G.
中间体：2,2-双(4-羟基苯基)丙烷
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举一反三
【单选题】Preparing the final test paper _______ his whole afternoon.
A.
takes up
B.
takes off
C.
takes on
D.
takes over
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【单选题】Which party takes over the project and put it into use?
A.
The Contractor
B.
None of the above
C.
The Employer
D.
The Engineer
查看完整题目与答案
【单选题】Which party takes over the project and put it into use?
A.
The Employer
B.
The Contractor
C.
The Engineer
D.
None of the above
查看完整题目与答案
【单选题】毎晩何時間ぐらい 勉強します()
A.
か
B.
ね
C.
よ
D.
わ
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【单选题】Which countries were mainly the main capital of aid in the 1990 's?
A.
developed countries
B.
developing countries
C.
undeveloped countries
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【单选题】Which of the following is true concerning the Tory Party or the Whig Party?
A.
The Whig Party no longer exists in Britain.
B.
The Tory Party has kept its unity until the present day.
C.
The Whig Party has taken the place of the Liberal Party.
D.
The Tory Party has taken the place of the Conservative Party.
查看完整题目与答案
【单选题】Hospital doctors do not go out very often as their work takes______all their time.
A.
in
B.
over
C.
up
D.
down
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【单选题】Which party takes over the project and put it into use?
A.
None of the above
B.
The Engineer
C.
The Empoyer
D.
The Contractor
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【单选题】在下列情况下,金钱可以成为“激励因素”而不是“保健因素”的是( )。
A.
那些未达到最低生活标准、急于要养家糊口的人的计件工资
B.
组织在个人取得额外成就而很快给予的奖金
C.
以上两种情况均可使金钱成为激励因素
D.
无论什么情况下金钱都只是保健因素
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【单选题】The PEP was tested across cultures by running the programme in 2 countries. Which countries were tested?
A.
USA and France
B.
Germany and UK
C.
India and Singapore
D.
Russia and Italy
E.
China and Brazil
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相关题目：
【单选题】Preparing the final test paper _______ his whole afternoon.
A.
takes up
B.
takes off
C.
takes on
D.
takes over
查看完整题目与答案
【单选题】Which party takes over the project and put it into use?
A.
The Contractor
B.
None of the above
C.
The Employer
D.
The Engineer
查看完整题目与答案
【单选题】Which party takes over the project and put it into use?
A.
The Employer
B.
The Contractor
C.
The Engineer
D.
None of the above
查看完整题目与答案
【单选题】毎晩何時間ぐらい 勉強します()
A.
か
B.
ね
C.
よ
D.
わ
查看完整题目与答案
【单选题】Which countries were mainly the main capital of aid in the 1990 's?
A.
developed countries
B.
developing countries
C.
undeveloped countries
查看完整题目与答案
【单选题】Which of the following is true concerning the Tory Party or the Whig Party?
A.
The Whig Party no longer exists in Britain.
B.
The Tory Party has kept its unity until the present day.
C.
The Whig Party has taken the place of the Liberal Party.
D.
The Tory Party has taken the place of the Conservative Party.
查看完整题目与答案
【单选题】Hospital doctors do not go out very often as their work takes______all their time.
A.
in
B.
over
C.
up
D.
down
查看完整题目与答案
【单选题】Which party takes over the project and put it into use?
A.
None of the above
B.
The Engineer
C.
The Empoyer
D.
The Contractor
查看完整题目与答案
【单选题】在下列情况下,金钱可以成为“激励因素”而不是“保健因素”的是( )。
A.
那些未达到最低生活标准、急于要养家糊口的人的计件工资
B.
组织在个人取得额外成就而很快给予的奖金
C.
以上两种情况均可使金钱成为激励因素
D.
无论什么情况下金钱都只是保健因素
查看完整题目与答案
【单选题】The PEP was tested across cultures by running the programme in 2 countries. Which countries were tested?
A.
USA and France
B.
Germany and UK
C.
India and Singapore
D.
Russia and Italy
E.
China and Brazil
查看完整题目与答案