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问题 填空题

（8分）常温下将0.2 mol/L HCl溶液与0.2 mol/L MOH溶液等体积混合(忽略混合后溶液体积的变化)，测得混合溶液的pH＝6，试回答以下问题：

(1)①混合溶液中由水电离出的c(H+)________HCl溶液中由水电离出的c(H+)。(填“>”、“<”或“＝”)

②求出混合溶液中下列算式的精确计算结果(填具体数字)：

c(Cl－)－c(M+)＝__________mol/L；c(H+)－c(MOH)＝________mol/L。

(2)常温下若将0.2 mol/L MOH溶液与0.1 mol/L HCl溶液等体积混合，测得混合溶液的pH<7，则说明在相同条件下MOH的电离程度______MCl的水解程度。(填“>”、“<”或“＝”)

答案

（1）①>；②9.9×10-7；10-8；（2）<

听力题

阅读短文，根据短文内容及首字母提示，在空白处填入一个适当的单词。

Do you like animals? Do you want to keep animals? Yes, many people like animals and want to keep a lovely animal as a p_____ . It's a pity that they don't have a suitable place to keep them. However, keeping fish may be the best choice.

Why keep them?

People keep dogs and cats because they enjoy their friendship. Fish can not be friendly, but they have beautiful shapes and colors. It's a pleasure to watch as they swim i_____   their tank（水槽）。

What do they need?

First of all, the fish need a suitable （合适的） tank, and you must fill the tank w_____  suitable water. It is also good for t_____  to have a few water plants in the tank to keep the water pure （纯净）。 Putting a few snails （蜗牛） in the tank is a good i_____  . They will keep it c_____  

What about feeding them?

There are many kinds of fish food t_____   you can get in the shops. Most are suitable for all kinds of fish. You should feed your fish only o_____   a day. It is important not to give them  t_____   much food. Just give them as much as they can e_____   up in about 15 minutes. This will keep them healthy.
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单项选择题

存款应付利息一般采取系统自动按月计提方式，1至11月计提日期为（），12月计提日期一般为26日和29日。

A.每月20日

B.每月21日

C.每月月末

D.每月月末前一天
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