问题 问答题

如图图是甲、乙两物质的溶解度曲线图:

(1)在温度为______℃时,甲、乙两物质的溶解度相等.

(2)20℃时含有少量未溶解的乙物质的饱和溶液中,若要使乙物质完全溶解,可以采用的方法是______.

(3)40℃时,向100g水中加入60g甲物质,充分溶解后所得溶液中溶质的质量分数为______(精确到0.1%).

答案

(1)t℃时,甲、乙两曲线交于一点,故t℃时,两物质的溶解度相等;

(2)乙的溶解度随着温度的升高而减小,故要使乙物质完全溶解可以采取向溶液加水或降低温度的方法;

(3)40℃时,甲的溶解度为50g,故向100g水中加入60g甲物质,充分溶解后最多只能溶解50g,所得溶液中溶质的质量分数为

50g
50g+100g
×100%=33.3%.

故答案为:(1)t;(2)向溶液加水或降低温度;(3)33.3%.

完形填空

阅读下面短文,并根据短文后的要求答题(请注意问题后的字数要求)。

Canadian culture was heavily influenced by British culture and traditions. Now one can also notice the influence of American culture. Over the years, lots of people have moved to Canada. There has been a healthy change of Canadian’s ideas that has resulted in the development of certain special features in Canada. There people of Canada have always been proud of their diverse cultural backgrounds.

2Art: Canada has some of the most wonderful classical works of art. In the year of 1930, artists began developing their own personal style. The “Group of Seven” is considered to be the first group of native artists to create their own style.

Language and religion: Because of its diverse cultures, Canada has two official languages, English and French. There is         .  A number of people in Canada have confirmed that they have no religious belief, though there are many other groups that follow Protestantism as a religion.

Literature: The literature of Canada basically shows the different cultural influences of other countries. Some of the early works were divided according to the region of Canada from which the author came, but there were also authors who gave a humorous touch to serious contents. A number of authors have been awarded for their literature works.

Music: Music in Canada has seen many developments in styles along the way. Many Canada musicians have earned worldwide fame. From folk music to rock, Canadian music continues to entertain people. In recent years, music from Asia and Africa has found quite a fan following in Canada.

小题1: What is the main idea of the text? (no more than 3 words)

                                                                          

小题2: Fill in the blank in Paragraph 3 with proper words. (no more than 3 words)

                                                                          

小题3:What does the word “ their” ( Line 7, Para. 1 ) refer to?  ( no more than 2 words)

                                                                           

小题4:Canadian culture has been influenced by many other countries. List all of them mentioned in the text. ( no more than 10 words)

                                                                           

小题5:Complete the following statement with proper words. (no more than 5 words )

Recently, music from Asia and Africa has become                     in Canada.

判断题