在对柴油机经济性分析中，与此有关的性能指标是（）。①有效功率；②有效热效率；③有效油

简述瘢痕挛缩性足下垂治疗方法。

Jim has some______ . They are his mother's cousins.[ ]

A. brothers  

B. uncles    

C. aunt      

D. siste

“Russia wants to maintain its established diplomatic relations with Libya  and  never  interrupt  them________which government was in power in Libya，” the leader said.

A．because of

B．regardless of

C．in need of 　

D．in terms of

老师不想A看到哪个同学B落下，希望我们班的同学C四年后D毕业。

A．一起

B．一起

C．一起

D．一起

地沟油实际上是一个泛指的概念，是人们在生活中对于各类劣质油的通称。可以通过看透明度、闻气味等方法加以判断。