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【单选题】
下列溶液属于等渗溶液的是A.
5%葡萄糖
B.
9%氯化钠
C.
0.1%氯化钠
D.
2%尿素
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【单选题】He is one of the old scientists who ______nothing about his personal income and fame .A．caresB．c
A.
25. He is one of the old scientists who ______nothing about his personal income and fame . A．cares
B.
care
C.
is caring
D.
are caring
【单选题】The little child__ go out alone at night, so he__ walk in the dark that night.
A.
daren't; didn't dare to
B.
doesn't dare; dare not
C.
isn't dare to; dared not to
D.
doesn't dare to; dare not to
【单选题】Jack didn't see the steps in the dark, so he ________ down.
A.
fell
B.
had fallen
C.
was falling
D.
would fall
【单选题】. Many scientists believe that now we can study the behavior of a three-year-old child to see ____ they will grow up to be criminals.
A.
that
B.
how
C.
why
D.
whether
【单选题】While other scientists are keeping____eye on changes in the H5N1 bird flu strain, the scientists in England are working on vaccines, in case it becomes highly infectious in ____humans.
A.
a , /
B.
an, /
C.
the, an
D.
an, the
【简答题】党的领导地位是由我国宪法明文规定的,具体是由以下 ( ) 方面决定的。 A . 中国的特质 B .中国的历史贡献 C .中国的领导能力
【单选题】Scientists have known the reason that people grow old.
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】Who are moat likely to grow old sooner?
A.
The doctors.
B.
The scientists.
C.
The farmers.
D.
The singers.
【单选题】To those scientists, it still remains to be a question ______ man can go back to the old days with time machine.
A.
if
B.
that
C.
how
D.
whether
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