避雷针的接地引下线应采用截面积不小于（）的多股铜线。
A.10mm²
B.25mm²
C.35mm²
D.70mm²
参考答案：C
Mr. Bush, together with his wife and daughter _____ going to Japan next week.
A．are
B．is
C．will be
D．would be
附着升降脚手架的架体高度不应大于（）m，宽度不应大于1.2m，架体构架的全高与支撑跨度的乘积不应大于110m2
A、15
B、20
C、25
D、30
