地层承压能力试验的目的就是检验油、气层的（）能力。
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一个正常的拧紧连接螺纹副摩擦消耗的转矩约占总转矩的（）
A. 10%
B. 20%
C. 30%
D. 40%
Air trapped in the hydraulic fluid of a steering system would be indicated by（）
A. an improper rudder response
B. hammering noises in the equipment or transmission lines
C. popping or sputtering noises
D. all the above
Cargo that is suitable for carriage on Ro-Ro vessels includes（）.
A. trailers
B. rolling vehicles
C. containers
D. All of the above
住房公积金账户余额可以直接抵扣购房首付款。
A. 正确
B. 错误
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