问题
选择题
下图是甲、乙、丙三种物质的溶解度曲线，下面说法不正确的是
A.甲的溶解度受温度影响最大
B.10℃时，三种物质的溶解度大小顺序为：丙＞乙＞甲
C.30℃时，乙、丙两种物质的饱和溶液溶质质量分数相等
D.50℃时，分别将40g甲、乙两种物质放入100g水中充分搅拌，均得到饱和溶液
答案
答案：D
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下图是甲、乙、丙三种物质的溶解度曲线，下面说法不正确的是
A.甲的溶解度受温度影响最大
B.10℃时，三种物质的溶解度大小顺序为：丙＞乙＞甲
C.30℃时，乙、丙两种物质的饱和溶液溶质质量分数相等
D.50℃时，分别将40g甲、乙两种物质放入100g水中充分搅拌，均得到饱和溶液
答案：D
Some people have very good memories（记忆力）and can ___learn quite long poems（诗歌）by heart. __ people have poor memories and can’t remember things ____they have said them over and over again. The famous English writer, Charles Dickens, said that he could walk down any long street in ____ and then tell you the names of all the shops he had __. Many great men of the world have wonderful memories. A good memory is a great help __a language. Everybody learns __ own language by remembering the things he heard when he was a small child. Some children like those who live in foreign countries with their parents, seem to learn two languages as ___ as they do one. In school it is not so easy for pupils to learn a second language because they have very __ time for it. Memory ___a diary that we keep every day.
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