上抽转抽施工质量要求下井的回音标外径不小于?118mm，防冲距、光杆长度合适，上冲程不碰井口，下冲程不碰泵。
参考答案：错
187. Bill Gates has made it known that much of his wealth _______ to the society.
A．will leave
B．has left
C．is to be left
D．would be left
货物运输合同的客体是( )。
A．运输费用
B．运输工具
C．被运货物
D．运输行为
