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【多选题】
受精的意义在于A.
启动细胞分裂
B.
子代获得双亲的遗传物质 ,
C.
恢复二倍体
D.
决定遗传性别
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A.
all of what
B.
all of which
C.
all of them
D.
all of whom
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【单选题】Mr. Zhang said that he would be punctual for the appointment, _______ he were late?
A.
but what if
B.
and what about
C.
so what
D.
how about
【简答题】按标准的级另分类,我国的标准分为
【单选题】“What were you doing while all this was _______ the manager demanded angrily。
A.
getting on
B.
going on
C.
holding on
D.
carrying on
【简答题】按标准的级另分类，我国的标准分为：国家标准、行业标准、（）、企业标准。
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