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【判断题】
对化合物而言,分子就是道尔顿所谓的 “复杂原子”A.
正确
B.
错误
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举一反三
【单选题】I never seem to lose any weight, __________I try hard.
A.
even though
B.
no matter how
C.
as if
D.
ever since
【单选题】Mr. Black has been teaching English in a middle school _____ he came to China.
A.
for ever
B.
ever since
C.
since then
D.
long before
【简答题】已知△ABC，∠B=60°，且sinA-sinC+ 2 2 cos（A-C）= 2 2 ．求sinC的值．
【单选题】______ you have finished your work, you are free to do what you like.
A.
Now that
B.
Ever since
C.
For now
D.
By now
【单选题】You must be strict with your children _____________.
A.
in the future
B.
in future
C.
from now
D.
ever since
【简答题】△ABC中，若（sinA+sinB+sinC）（sinA+sinB-sinC）=3sinAsinB，则C=______．
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