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【多选题】
变压器一、二次绕组匝数之比等于()A.
一、二次侧感应电动势有效值之比
B.
一、二次侧电压瞬时值之比
C.
一、二次电流有效值之比
D.
变压器的变比
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【简答题】Robots 1．The most sophisticated (先进的) Japanese robots, which have vision systems and work at very high speeds, are still based on American designs. Studies of robots, particularly computer control sof...
【简答题】句型拓展。 1．The new pen is six yuan .( 提问划线部分) _________ ___________ is the new pen? 2.There are four people in my family. .( 提问划线部分) _______ _________ people are there i n your family? 3.They are going t...
【单选题】Antennas in the new systems have only changed in weight, and they are becoming lighter and lighter.
A.
Y
B.
N
C.
NG
【简答题】Robots 1．The most sophisticated (先进的) Japanese robots, which have Vision systems and work at very high speeds, are still based on American designs. Studies of robots,particularly computer control soft...
【单选题】Educationists across China are experimenting and trying out new assessing systems _______to assessing students' performance in school. [ ]
A.
suitable
B.
equal
C.
appropriate
D.
fit
【单选题】Compared with the former phone communications from aircraft, the new systems will provide clearer and more instant call service.
A.
Y
B.
N
C.
NG
【简答题】Why is it impossible to use the new technique to search for life in other solar systems now?
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