不得用不同品种的润滑油随便代替()。
参考答案:规定的润滑油
Hearing the loud noise,the boy looked out of the window,__________.
A.surprised and nervously
B.surprising and nervous
C.surprised and nervous
D.surprisingly and nervously
痰鸣音属于()
A.响亮性湿啰音
B.非响亮性湿啰音
C.细湿啰音
D.中湿啰音
E.粗湿啰音