使用离子选择性电极时,在标准溶液和样品溶液中加入TISAB的目的是( )。
A. 提高测定结果的精确度
B. 维持溶液具有相同的活度系数和副反应系数
C. 消除干扰离子
D. 提高相应速率
查看答案
交际用语1-5题：阅读下面的小对话，选择恰当的答语。一Do you have any experience with caring for babies?一 .
A. Yes, I do. I have looked after kids for 3 years.
B. No, you are freshmen. You should work hard.
C. Yes, they are. they are very cute and, smart.
一Could you please help me choose an mp4 player online?一( ) my computer doesn’t work.
A. I don’t agree.
B. I hope so.
C. I’m afraid I can’t．
一What about learning a foreign language in the summer holiday?一 .
A. It’s a good idea.
B. Yes, I agree with you.
C. No, I don’t think so.
微信支付 
支付宝支付