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【单选题】
设函数y=f(x)可导，且f(x)<0，f(x)<0，又△y=f(x＋△x)-f(x)， dy=f(x)△x，则当△x>0时，有( )A.
△y>dy>0
B.
△
C.
dy>Ay>0
D.
dy
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【单选题】Besides the film Pocahontas, which one of the four films also touches upon the relationship between human and nature?
A.
Titanic
B.
Frozen
C.
Avatar
D.
Toy Story
【简答题】Besides the film and
the bar, what other service does the plane have?
【单选题】B Smog(雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with ...
A.
Using cleaner energy.
B.
Cleaning coal and oil.
C.
Using natural gas.
D.
Replacing coal with wind energy.
【简答题】托盘高度基本尺寸为__和__两种。
【单选题】B Smog(雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with ...
A.
Only factories produce heavy smog .
B.
It tells us two ways to protect environment.
C.
Taking public traffic is good for the environment.
D.
Ordinary people can do nothing to help control smog.
【单选题】What makes the film attractive besides the movie itself?
A.
Excellent filmmaking skills.
B.
Twists and turns of the story.
C.
Many Jewish references.
D.
Mixture of comedy and tragedy.
【单选题】B Smog(雾霾 ) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with ...
A.
Setting off too many fireworks.
B.
Burning too much coal and oil.
C.
Too many cars in big cities.
D.
Too many factories and companies.
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