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[主观题]
测得圆形的半径r=1.465m,已知其中误差m=±0.002m,则其周长的中误差为0.013m。()
测得圆形的半径r=1.465m,已知其中误差m=±0.002m,则其周长的中误差为0.013m。()
A.错误
B.正确
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.错误
B.正确
A.错误
B.正确
A.正确
B.错误
A.0 A
B.5∠90°A
C.10∠-90°A
A.RL电路:Z=5-j7
B.RLC电路:Z=2-j3
C.RC电路:Z=5+j2
D.LC电路:Z=2+j3
A.y=6000+24x
B.y=6+0.24x
C.y=24+6000x
D.y=24000+6x