如图表示的是甲、乙两种固体物质的溶解度曲线，下列叙述正确的是（ ）
A．甲的溶解度大于乙的溶解度
B．35℃时100g甲的溶液中含甲的质量60g
C．降低温度可使接近饱和的甲溶液变成饱和溶液
D．10℃时甲、乙两种溶液的溶质质量分数一定相等
A、比较两种物质溶解度的大小，必须有温度的限制，故A错；
B、35℃时甲的溶解度是60g，即该温度下，100g水中最多溶解60g甲，所以35℃时160g甲的饱和溶液中含甲的质量60g，故B错；
C、降低温度时甲物质的溶解度减小，会析出晶体，所以溶液仍然是饱和溶液，故C正确；
D、10℃时甲、乙两种的溶解度相等，饱和溶液的溶质质量分数相等，没说明溶液是否饱和，不能比较溶质质量分数的大小，故D错．
故选C．
| 选择正确单词完成下列短文。 |
| I 1 writing a letter 2 my cousin. I write with a pen. I write 3 a piece of paper. 4 the top of the letter, I write the day. What day is it? It's Thursday, March 12th. I write my name at the bottom of 5 letter. I put my letter in an envelope. Now, I write the address on the envelope. |
| ( ) 1. A. is ( ) 2. A. on ( ) 3. A. on ( ) 4. A. Are ( ) 5. A. the | B. are B. to B. with B. On B. on | C. am C. in C. at C. Up C. many |
| 根据上面的短文回答问题。 1. What are you doing? 2. What day is it? 3. Where do you write your name? 4. Do you put your letter in an envelope? 5. Where do you write the address? | ||