【C14】
A. ready
B. sure
C. easy
D. close
屋面保温层厚度的允许偏差,对于整体现浇保温材料为().
A﹒-5%~+5%
B﹒-5%~+10%
C﹒+5%~-10%
D﹒-10%~+10%
【C16】
A. advantage
B. problem
C. issue
D. concern
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