t℃时,向硝酸钠饱和溶液中加入一定量的水后,下列有关该溶液的叙述正确的是[ ]
A.仍为饱和溶液
B.溶质的质量变小
C.溶质的溶解度不变
D.溶质的质量分数不变
答案:C
Our country has changed a lot over the years. And every Chinese our mother land. [ ]
A. are proud of
B. is proud of
C. takes proud in
D. take proud in
正常情况下,原尿与血浆相比,主要是不含有( )
A.蛋白质
B.葡萄糖
C.血细胞
D.尿素