溶解度可表示物质溶解性的大小。

①氯化钠、硝酸钾的溶解度曲线如图所示，据图回答：

Ⅰ.溶解度变化受温度影响大的是____。

Ⅱ.t℃时，将5.5g硝酸钾加入____g水中，完全溶解后，恰好得到饱和溶液。要进一步提高该溶液的溶质质量分数，可进行的操作是____。

Ⅲ.硝酸钾溶液中含有少量氯化钠，提纯的方法是____、____、过滤、洗涤、干燥。

②室温时，对100mL硫酸铜饱和溶液作如下图操作，最终甲、乙两烧杯中____。

A. 溶质质量：甲<乙                     B. 溶剂质量：甲>乙

C. 溶液质量：甲=乙                     D. 溶质质量分数：甲=乙

图草履虫结构中5、6进行呼吸；食物在4消化．（判断对错）

任务型阅读

    Some people like to work alone while others enjoy teamwork. In my opinion, everyone had better learn to work with others together because teamwork is definitely necessary and important in modern society.

    First, working in a team provides a chance for us to communicate with each other. Just as the saying goes, “many hands make light job.” Working in a team, teammates share their ideas with each other, which is helpful to create a better achievement. Second, working in a team is a way to broaden our horizon(眼界). Teammates in a team can learn something from each other because they are from different places, owning various experiences and hold different views towards things. Therefore, getting along with other teammates is also a process of increasing our knowledge. Third, working in a team is also a way to establish(建立) our friendship. Teammates in a team have chances to help each other, to solve the problems together, to share the happiness of being successful, which make a great contribution（贡献） to establishing friendship.

    So working in a team is one of the most effective（有效的） ways to extend（扩展） our personal relationships. To sum up, to learn to work in a team is really necessary and important and we should try to enjoy it.

完形填空
    In China, almost everyone knows Ma Yun. Ma Yun became one of1 men in China when his company Alibaba went on the stock（股票)market last year with a value of around £140 billion-the largest public offering in history.2 amazing thing it is! Here are some stories about him on the way to 3 .
    Ma made his4 trip to the US in 1995 and used the Internet 5 the first time. After 6 for "beer”, he saw that no results 7up about China. Then he searched for "China” and still saw no results. He decided to set up a Chinese website--the seed for Alibaba was sown(播种).Ma said he 8 many times in his life. He failed the College Entrance Examination in China three times and9 companies offered him jobs, including one at KFC. And he was refused by the famous Harvard University 10 times.
    Learning English was difficult when Ma was a teenager 10limited resources. However, he found that he could learn English well by giving tourists free guides around 11 hometown Hangzhou. And he kept it for nine years. Ma said that tourists opened up a new world for him because everything they said and did was so different from 12 he had been taught at school and by his parents.
    Ma's hero is Forrest Gump13never gives up. When he made a speech about his success at Davos(达沃斯论坛)in 2015,Ma said, "Life14 a box of chocolates because you never know what you are going to get.”15 as Ma does, never give up and you will be successful one day.

流失海外辗转多年的圆明园兔首和鼠首铜像于2009年2月25日在巴黎拍卖。历史上，导致铜像流失海外的是（    ）