题目
A.2sin(314t-60°)A
B.2sin(314t+60°)A
C.50sin(314t+90°)A
D.50sin(314t+120°)A
第1题
A.2sin(314t-60°)A
B.2sin(314t+60°)A
C.50sin(314t+90°)A
D.50sin(314t+120°)A
第2题
A.2sin(314t-60°)A
B.2sin(314t+60°)A
C.50sin(314t+90°)A
D.50sin(314t+120°)A
第3题
A.2sin(314t+120°)A
B.2sin(314t+90°)A
C.2sin(314t+-60°)A
D.2sin(314t+30°)A
第4题
A.2sin(314t+120°)A
B.2sin(314t+90°)A
C.2sin(314t+-60°)A
D.2sin(314t+30°)A
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