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【单选题】
可以直接测量病毒大小的方法是A.
电镜观察法
B.
光镜观察法
C.
X线衍射法
D.
超速离心法
E.
超过滤法
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反馈参考答案：
举一反三
【单选题】Sofar, __________soup and roast chicken.
A.
we’ve been making
B.
we ’ ve made
C.
we had been making
D.
we had made
【简答题】看拼音,写词语 ké sou
【简答题】细胞内4种主要生物大分子单体的碳骨架与功能团各有哪些特征？哪些生物学功能？
【单选题】The factory produced a large amount of furniture last year, so far 65 percent of which _____ exported to some European countries. [ ]
A.
has been
B.
are
C.
was
D.
were
【单选题】Please_________ . your sou will be OK.
A.
being calm
B.
been calm
C.
be calm
D.
be calmly
【单选题】Sofar,howlonghastheShanghaiWorldExpobeenon?
A.
For20days.
B.
Foramonth.
C.
Forfourweeks.
D.
Forabout50days.
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