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【单选题】
根据ISCN,正常男性G组染色体数目为A.
2条
B.
3条
C.
4条
D.
5条
E.
1条
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举一反三
【单选题】I think this is the very work that we must finish ____ her.
A.
to help
B.
help
C.
helping
D.
helped
【单选题】Early in his life, he learned to treasure the work of other people he helped his father do the farming. [ ]
A.
where
B.
what
C.
when
D.
whom
【单选题】关于某消费者的无差异曲线的下列陈述中，一般来讲，不正确的是( )。(电子科技大学2010研)
A.
一条无差异曲线的点代表相同的效用水平
B.
两条无差异曲线相交意味着该消费者不是理性的
C.
“多多益善”假设暗示：越靠近原点的无差异曲线代表着更高的效用水平
D.
无差异曲线的斜率实际上代表了该消费者在不同商品之间替代意愿
【单选题】With his mother_______ him, he is getting on well with his work.
A.
helping
B.
to help
C.
help
D.
helped
【单选题】I will ___ you to dinner because you helped me with my work.
A.
treat
B.
thank
C.
make
【单选题】Having no one else _____ him with the work, he had to put it off till later.
A.
help
B.
Helped
C.
helping
D.
to help
【单选题】要为文本或图像添加 E-mail 链接,需要在“链接”框中邮箱地址前添加()。 To add an E-mail link to a text or image, what code () needs to be added before the E-mail address in the link box?
A.
news:
B.
fip://
C.
http://
D.
mailto:
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