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【单选题】
下列羰基化合物中,可以与 HCN 发生加成反应,且可以与 Fehling 试剂发生反应的是( )A.
C 6 H 5 CHO
B.
环戊酮
C.
CH 3 CH 2 CHO
D.
C 6 H 5 COCH 3
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反馈参考答案：
举一反三
【单选题】If I __ you, I 'hi' to her. [ ]
A.
am, will stay
B.
was; would say
C.
were, will say
D.
were, would say
【单选题】—Which kind of juice would you prefer, pineapple or orange? —_____. I must say I’ve a strong preference for tea.
A.
Both
B.
None
C.
Neither
D.
Either
【单选题】If I _______ you, I would say another student could do it better.
A.
was
B.
were
C.
were
D.
are
【单选题】–I argued with my best friend. What should I do? --If I ________ you, I would say sorry to her.
A.
am
B.
was
C.
are
D.
were
【简答题】扳手的选用原则:优先选用 ,其次为 梅花扳手 ,再次为 开口扳手 ,最后选 活动扳手 。
【简答题】扳手的选用原则是优先选用( )扳手,其次为( )扳手,再次为( )扳手,最后选( )扳手。
相关题目：
【单选题】If I _______ you, I would say another student could do it better.
A.
was
B.
were
C.
were
D.
are
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