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【多选题】
某一对称三相负载,每相的电阻 ,联成三角形,接于线电压为380V的电源上,试求其相电流和线电流的大小和三相电功率。A.
解： 三角形联接
B.
解： 三角形联接
C.
则
D.
则
E.
F.
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【简答题】What do some people see as the root cause of pollution when technical solutions to the problems are not available?
【单选题】What do some people want to know about space exploration?
A.
How space research benefits people on Earth.
B.
When the International Space Station was built.
C.
How many space shuttle missions (太空穿梭任务) there will be.
D.
When America's earliest space program started.
【单选题】What do some people do with their Savannah cats?
A.
They shake their front paws.
B.
They shower with them.
C.
They teach them to dive.
D.
They shout at them.
【简答题】What do some people do after they read a book online?
【简答题】What do some people say about the first semester and extracurricular activities? They say that .
【单选题】What do some people expect to happen?
A.
The trails will increase in popularity.
B.
The trails will be heavily damaged.
C.
Fewer hikers will use the trails.
D.
Bikers will be forced to volunteer for trail repair.
【单选题】What do some people do when they face a new situation?
A.
They make careful preparations beforehand.
B.
They take too many irrelevant factors into account.
C.
They spend too much time anticipating their defeat.
D.
They try hard to avoid getting off on the wrong foot.
【单选题】What do some people want to know about space exploration?
A.
When America’s earliest space program started.
B.
When the International Space Station was built.
C.
How many space shuttle missions there will be.
D.
How space research benefits people on Earth.
【单选题】According to the article, what do some people think their name reflects?
A.
their property
B.
their parents
C.
their personality
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