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【简答题】
典型的三相异步电动机的制动控制有( )和( )。
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【简答题】若函数 是幂函数,则m= .若是反比例函数,则 m= ;
【单选题】According to the reading, what advantages can technology offer education?
A.
a. ways to share information, such as blogs and wikis
B.
b. ways to do research and find information
C.
c. ways to present information
D.
d. all of the above
【单选题】What is the advantage of the Airlander 10 over huge jet planes?
A.
It uses the latest aviation technology.
B.
It flies faster than a commercial jet.
C.
It is a safer means of transportation.
D.
It is more environmentally friendly.
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