煤中的水分和灰分,通过机械不可除去的是()。
A.内在灰分和外在水分
B.外在灰分和内在水分
C.外在灰分和外在水分
D.内在灰分和内在水分
参考答案:D
—They started working on the show two months ago, didn’t they?
—___________. A lot of work needed to be finished before the show.
A.Yes, they did
B.No, they didn’t
C.Yes, they didn’t
D.No, they did
靠膨胀作用促使片剂崩解的辅料是
A.羧甲基纤维素钠
B.酒石酸
C.交联聚维酮
D.十二烷基硫酸钠
E.碳酸氢钠