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【简答题】
图片题，用彩色的方块格子画的树。这是数学家根据哪一理论画出的图形?
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皮皮学刷刷变学霸
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【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？
【简答题】两个同频率的正弦电流 i 1 ( t )=10cos(10t+150 ° )V, i 2 ( t )=5cos(10t—100 ° )V, 则 i 1 ( t ) 与 i 2 ( t ) 的相位差为( ),相位关系是( )。
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