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【简答题】
基因突变通常是独立的，随机发生的，而且突变的发生具有______、______、______、______和______的特征。
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反馈参考答案：
举一反三
【单选题】He has made a very serious mistake in his planning. He has forgotten that the rule is only ______ to the U.S. citizen.
A.
competent
B.
suitable
C.
appropriate
D.
applicable
【简答题】( ) 1 Miss Smith is a friend of____. A. Mary's mother's B. Mary's mother C. mother's of Mary ( ) 2 This is a book of ___. A. Tom B. Tom's C. her ( ) 3 The post card is sent by ____. A. a friend of...
【单选题】This is a friend of ( ) .
A.
Mary’s mother
B.
Mary mother’s
C.
Mary’s mother’s
D.
Mary mother
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