You should NOT use a power tool if ().
A. It has a three-prong plug
B. The insulation of the power wires is worn
C. Hand tools can be used instead
D. The power source is alternating current
检验批可依据施工及质量控制和专业验收需要按()进行划分.
A﹒时间
B﹒楼层
C﹒施工段
D﹒变形缝
E﹒工期
【C3】
A. approaching
B. exceeding
C. equaling
D. surpassing
【C20】
A. fail
B. decline
C. strive
D. manage