所需转舵力矩大并仅被小船使用的舵是:() ["平板舵","流线型舵","普通舵","平衡舵"]
钻井液混油后可以使分散剂的分散作用()。 ["A、增加","B、不变","C、降低","D、都不是"]
锁定产生的原因是什么,锁定与转移成本的关系怎样?
若是超深井温度高导致粘度上升,最好加()降粘。 ["A、单宁","B、SMT","C、PAM","D、栲胶碱液"]
具有阻力小、舵效高并被海船广泛采用的舵是:() ["平板舵","流线型舵","普通舵","平衡舵"]
煲汤一年四季均适合食用,夏秋季节的汤水适宜?