下面哪些讨薪方式是不适当的（）
A.跳楼
B.堵路
C.威胁用人单位
D.使用法律手段
E.申请调节
参考答案：A, B, C
—Are there any fish in the lake now?
—No, _____ any water in it in winter. [ ]
A. there isn't
B. there aren't
C. it isn't
D. they aren't
⑤Ⅱ 桩的相互影响效应系数ηi=( )。
A．1.42
B．1.32
C．0.64
D．0.42
