To______, she keeps on exercising every day as well as________.
A:lose weight; goes on a diet
B:lose her weight; going on a diet
C:lose weight; going on a diet
D:lose her weight; go on a diet
Mg和Mg2+因具有相同的质子数,故属于同种元素,又因为它们具有不同的____数,故属于两种不同的微粒。
下列不利于兰州市“创建国家卫生城市”的做法是( )