废水渠渗漏造成地下水污染属（）污染。
A.间歇入渗型
B.连续入渗型
C.越流型
D.经流型
参考答案：B
It is _______ he had to send his brother to hospital _______ he was late.
A．that; so
B．for; that
C．because; so
D．because; that
登高板应（）进行一次静负荷试验，施加2205N静压力试验，持续时间为5min。
A.一年
B.二年
C.半年
D.一年半
