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【单选题】
下列物体受平衡力作用的是( )A.
正在进站的火车
B.
被投掷出去在空中运动的实心球
C.
站在商场自动扶梯上匀速运动的顾客
D.
绕地球匀速转动的“北斗”卫星
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皮皮学刷刷变学霸
举一反三
【简答题】are helped a lot in our country.
【单选题】-Our country_ a lot so far. -Yes, I hope it will be even_.
A.
has changed;well
B.
changed;good
C.
has changed;better
D.
changed;better
【单选题】Our country has changed a lot over the years. And every Chinese our mother land. [ ]
A.
are proud of
B.
is proud of
C.
takes proud in
D.
take proud in
【单选题】______ helped a lot in our country.
A.
The blind was
B.
The blind were
C.
The blinds was
D.
Blind were
【单选题】- Our country ____a lot in recent years.
A.
Yes. I hope it will be even____.
B.
has changed; well
C.
changed; good
D.
has changed; better
E.
changed; better
【单选题】Within five years，cars will be a lot in our country．
A.
cheap
B.
cheaper
C.
cheapest
D.
the cheapest
【单选题】Our country did a lot about the drunk-driving, and it took some time ____ the situation got better.
A.
after
B.
since
C.
unless
D.
before
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