柴油机机油泵的作用是使()压力升高,并将其强制地压送到柴油机各摩擦表面上去。
A.新鲜空气
B.润滑油
C.燃料油
D.冷却水
参考答案:B
简述品牌经理“改进”作业的关键点。
The people ______ helped us build our hometown are from Beijing. [ ]
A. which
B. whom
C. who