自吸能力是（）的主要性能指标。
A.液压马达
B.液压马达和液压泵
C.液压泵
D.都不是
参考答案：C
按临床表现将病毒性肝炎分为______、______、______、______四型。
In Japanese party politics, the Liberal Democrats are more prone to stand by their principles than their conservative and nationalist counterparts.
A．True
B．False
