A．尽量让燃料充分燃烧
B．尽量减少热机工作时间
C．尽量减少各种热损失
D．保证转动部分良好润滑
答案：B
After a long time’s hard work, he _________ Qinghua University last year.
A．was admitted
B．was admitted into
C．admitted into
D．admits into
肝胃不和型恶阻的特征是（）
A.口中泛酸
B.呕吐痰涎
C.呕吐酸腐
D.呕吐酸水或苦水
E.呕吐清涎
