买一个热水器的价钱是876元,买同样的4个热水器共要用多少钱?
876×4=3504(元),
答:买同样的4个热水器共要用3504元钱.
(1)相对分子质量最小的氧化物 ______(填名称);
(2)雪碧等饮料中常含的一种酸 ______(填化学式).
— What does Mary look like?
— _____. [ ]
A. She's well
B. She's tall
C. She's a doctor
D. She likes dancing