某餐馆门口贴着一副对联,上联是:“ ,弃之可惜”;下联是:“杯中酒口口都香甜,量力而行”。请你将中小学生都很熟悉的一首古诗中的有关语句填入上联,使之完整。
盘中餐粒粒皆辛苦
“What are you busy for?”—This is a question we very often get _____ nowadays.
A.asking
B.being asked
C.asked
D.to ask
分子和原子的观点解释下列事实:
(1)氧化汞受热分解生成汞和氧气
(2)水受热变成水蒸气
(3)水通电分解生成氢气和氧气
(4)碘溶于酒精配制成碘酒.