润滑油冷却器的作用:是()。
参考答案:冷却润滑油,降低轴承温度
However, in ______ recent years, _________ Niagara Falls have come to be appreciated more for
their natural beauty as _________ wonder of Nature.
A. /; the; a
B. the; /; the
C. /; the; /
D. the; /; a
治疗肺胃出血,宜首选()
A.白及
B.大蓟
C.槐花
D.地榆
E.白及根