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【简答题】
建筑物按用途的不同大致可分为 、 和 三类。
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反馈参考答案：
举一反三
【单选题】正弦电流 i =5sin ( 314 t +30 ° ) A 和正弦电压 u =4sin ( 314 t -60 ° ) V 的相位关系为( )。
A.
电流超前电压 90 °
B.
电流滞后电压 90 °
C.
电压超前电流 90 °
D.
无法确定
【单选题】It was not surprising that when some of the terracotta warriors were taken to the British Museum for an exhibition, they were a(n) ______ success. It seems that they’ll remain the number one tourist a...
A.
immediate; along
B.
instant; ahead
C.
accurate; beyond
D.
primitive; through
【简答题】一非正弦电流i=[3+12 sin(10t+68.2°)+4 sin(30t-15.1°)]A，其有效值I=______。
【多选题】Which of the following about the British Museum are true?
A.
It was the first museum in the world to be open to everyone.
B.
It charges no admission fee.
C.
It is the most modern museum in the world.
D.
It is one of the world's largest museums of human history and culture.
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