小明家书房台灯的灯泡上标有“PZ220-25”的字样,那么一度电可以供该灯泡正常工作的时间为( )
A.25小时
B.40小时
C.20小时
D.0.025小时
答案:B
—Does coffee really work when you have to work late into night?
—Yes. As far as I’m concerned,I feel very________ after a coffee.
A.energetic
B.normal
C.strong
D.sensitive
对于口腔、牙龈出血病人,为防止口臭应选择的漱口液为( )。
A.0.1%醋酸B.2%~4%碳酸氢钠C.0.9%生理盐水D.0.02%呋喃西林E.1%过氧化氢