向100g10%NaOH溶液中加入12.5gNaOH固体,完全溶解后.所得溶液中溶质质量分数为[ ]
A.12.5%
B.20.0%
C.22.5%
D.25%
答案:B
Changyu building, _____ a history of more than 700 years, is well-known for its magnificent appearance the quiet and natural surroundings.
A.having; in
B.with; against
C.with; for
D.has; against
以下不属于减毒活疫苗的有()。
A、注射用脊灰疫苗
B、白破二联疫苗
C、麻风疫苗
D、AC群结合流脑疫苗
E、水痘疫苗