电杆组装时横线路方向螺栓,面向受电侧,由右向左穿入。
参考答案:错
已知一直角三角形的木版,三边的平方和为1800cm2,则斜边长为( )
A.80cm
B.30cm
C.90cm
D.120cm
I _____ her carefully, but I _____ nothing. [ ]
A. listened; heard
B. listened to; heard
C. heard; listened
D. heard; listened to