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问题 选择题

溶解度曲线为我们定量描述物质的溶解性强弱提供了便利。请你根据下图的溶解度曲线判断下列说法，其中不正确的是

A．20℃时，甲物质的溶解度小于乙物质的溶解度

B．40℃时，两种物质的溶解度相等

C．60℃时，将80g甲物质放入100g水中所得溶液的质量为l60g

D．60℃时，将等质量的甲、乙两种物质的饱和溶液降温到20℃，析出晶体较多的是乙

答案

答案：D

A、由图可知，20℃时，甲物质的溶解度小于乙物质的溶解度，故说法正确；

B、40℃时，两种物质的溶解度曲线交于一点，故两种物质的溶解度相等，故说法正确；

C、60℃时，甲物质的溶解度为60g，故将80g甲物质放入100g水中，充分搅拌后只能溶解60g，将得到溶液的质量为160g；故说法正确；

D、甲物质的溶解度受温度的影响变化较大，故60℃时，将等质量的甲、乙两种物质的饱和溶液降温到20℃，析出晶体较多的是甲；

故选D．

写作题

阅读下面的短文，然后按照要求写一篇150词左右的英语短文。

With the development of the Internet and the popularization of computers, shopping on the Internet has become a common place in our life. Here consumers can buy almost everything they need.

Shopping on the Internet has a lot of advantages, of which the most important is perhaps its convenience. People don’t have to waste a lot of their energy and precious time to go from one shop to another to choose the commodities they like. This is especially desirable to the old, the sick and the busy people who cannot go to the shops in person. The goods come in all shapes, sizes and colors on the Internet. The commodities they order will be delivered to them promptly.

However, shopping on the Internet also has its disadvantages. The first disadvantage is that the consumers can’t see the goods or try them on personally. Sometimes, the real goods may not be the same as what they have seen on the computer. The second disadvantage is that some shops on the Internet are not registered. They will never deliver anything to you after they get the money from you. Once cheated, you will find that you have nowhere to go to complain.

1. 以约30个词概括短文的要点;

2. 然后以约120个词以”网上购物”为主题发表看法,并包括以下要点:

(1) 你认为网上购物的最大优点是什么;

(2) 描述你或你的朋友或同学网上购物的体验;

(3) 你对网上购物有什么建议.

1. 可以使用事例或其他论述方法支持你的观点, 也可以参照阅读材料的内容但不能直接引用原文中的句子;

2. 标题自拟.
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多项选择题

银期转账业务客户信息修改，投资者可通过此交易修改或增加联系信息，包括（）以及电子邮箱。

A.电话号码

B.手机号码

C.传真号码

D.联系地址和邮编
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