HAc的电离常数为
,在HAc溶液中加入NaAc固体,将使:
A.
B.
C.pH值升高
D.pH值降低
E.HAc的电离度增大
参考答案:C
In the ceremony, our headmaster required students to improve our competitive awareness in modern society.
A.we
B.us
C.our
D.ours
防火墙内()设置排气道。
A、不宜
B、可以
C、不应
D、严禁