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【简答题】
I think it unnecessary to go back there, _____we have visited these places. Aso that Bin order to Cprovided that Dnow that
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举一反三
【单选题】两个正弦电流:i1=15sin(100πt+45°),i2=15sin(200πt-30°),以下说法正确的是( )。
A.
两者的相位差为75°
B.
两者的有效值相等
C.
两者的周期相同
D.
两者的频率相等
【多选题】What is the connotation of virture ethics?
A.
A high-mined person will make the right choice, when facing a moral even.
B.
The purpose of virture ethics is to cultivate the virtuous or high-mined persons.
C.
It helps understand how morality influces the decion-making process in practice.
D.
It requires the medical staff to be of benevolence, sincerity, preciseness and fairness.
【单选题】Which of the following can cover all the connotation of the art of writing?
A.
Calligraphy
B.
penmanship
C.
handwriting
D.
none of them
【单选题】Which of the following can cover all the connotation of the art of writing?
A.
calligraphy
B.
penmanship
C.
handwriting
D.
none of them
【简答题】有两个同频率的正弦交流电流i1＝Im1sin（ωt＋120°）Ai2＝Im2sin（ωt－120°）A问：哪个电流超前？超前多少度？
【多选题】What's the connotation of Chinese Dream?
A.
country's prosperity
B.
national rejuvenation
C.
people's happiness
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