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【单选题】
对 CH 3 Br 进行亲核取代时,以下离子亲核性最强的是:A.
B.
C.
D.
D
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反馈参考答案：
举一反三
【简答题】The word “benevolent” (Line 3, Para. 3) means __________. A) relevant B) kind C) serious D) effective
【单选题】The word 'serving' (in Paragraph 2) means '______'.
A.
working as a soldier
B.
working as a servant
C.
working as a repairman
D.
working as a fisherman
【单选题】With respect to program variables,（73)means assigning a beginning value to a variabl
A.
B.
Setup
C.
startup
D.
initialization
E.
pre-compile
【单选题】叶粉末经微量升华得油状物,加硫酸2滴及香草醛结晶少量,初显黄色至橙黄色,再加水1滴,即变紫红色,用该法鉴别的药材是( )
A.
青蒿
B.
半枝莲
C.
薄荷
D.
穿心莲
E.
蒲公英
【单选题】With respect to program variables, (71) means assigning a beginning value to a variabl
A.
Setup
B.
startup
C.
initialization
D.
pre-compile
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