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【单选题】
下列化合物在水中的溶解度最小的是( )。A.
CH 3 CH 2 CH 2 CH 2 Br
B.
C 2 H 2 OC 2 H 5
C.
CH 3 CH 2 OH
D.
CH 3 (CH 2 ) 2 CH 2 OH
E.
CH 3 (CH 2 ) 3 CH 2 OH
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【单选题】在原子吸收分光光度法中,原子化器的作用是()。
A.
将待测元素转变为气态基态原子
B.
将待测元素转变为气态激发态离子
C.
将待测元素转变为气态激发态原子
D.
将待测元素转变为气态基态离子
【简答题】A．They will play tennis or baseball. B．They will go bicycling or hiking. C．They will go bowling. D．They will not have sports.
【单选题】在原子吸收分光光度法中,原子化器的作用是
A.
把待测元素变为气态激发态原子
B.
把待测元素变为气态激发态离子
C.
把待测元素变为气态基态原子
D.
把待测元素变为气态基态离子
【简答题】在原子吸收分光光度法中,原子化器的作用是 把待测元素转变为气态 。
【单选题】What will they do next?
A.
They will have a rest.
B.
They will have a walk.
C.
They will have a game.
【简答题】法律发展史上先后产生过( )法律、( )法律、( )法律和( )法律。
【简答题】A．They will play tennis or baseball. B．They will go bicycling or hiking. C．They will go bowling. D．They will not have sports.
【单选题】A) They will not be welcomed by young people. B) They will help to popularize early marriage. C) They will boost China's economic growth. D) They will not come into immediate effect.
A.
They will not be welcomed by young people.
B.
They will help to popularize early marriage.
C.
They will boost China's economic growth.
D.
They will not come into immediate effect.
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