问题 选择题

下列有关物质的性质或应用的说法中正确的是

A.铝合金是一种混合物,它比纯铝的熔点高

B.水晶项链和餐桌上的瓷盘都是硅酸盐制品

C.云、雾、烟均能产生丁达尔现象

D.电解从海水中得到的氯化镁溶液可获得金属镁

答案

答案:C

合金的熔点一般比它各成分的金属熔点底,A不正确。水晶是二氧化硅,不是硅酸盐,B不正确。云、雾、烟均属于胶体,C正确。电解熔融的氯化镁才能生成单质镁,如果电解氯化镁溶液,则生成氢氧化镁、氯气和氢气,D不正确。答案选C。

判断题
阅读理解

阅读理解。

     Australia has a holiday on Apr11, 25th. This holiday is called "Anzac Day", On the day, Australians

 remember the soldiers who died in the First World War.

     The American holiday of " Thanksgiving" is on the fourth Thursday in November. Families get together 

 on this day and have Thanksgiving dinner. Labour Day is also a holiday in America. It is on the first

 Monday in September.

     In Canada, Thanksgiving is on the second Monday in October. People there have Thanksgiving dinner, 

 too. July, lst is also a holiday in Canada. It is called " Canada Day " .

      People in China have a festival called the Dragon Boat Festival. This holiday is usually in June. On this

  day, people have boat races. In America, the UK, Australia and many other countries, Mother's Day is

 on the second Sunday in May and Father's Day is usually on the third Sunday in June.

      Many countries, such as America and the UK, celebrate Christmas on December, 25th. But there are 

 some countries in Europe that do not celebrate Christmas on that day.

     Canada and America celebrate Halloween on the last day in October. On this day, children wear fun

  clothes and get lots of sweets.

1. On _____, people remember the soldiers who died in the First World War.

    A. Canada Day          

    B. Anzac Day

    C. Halloween            

    D. Christmas

2. According to the passage, Labour Day is in September in _____ . 

    A. America              

    B. Australia

    C. the UK                

    D. China

3. Thanksgiving is _____ in Canada.

    A. on the second Monday in October

    B. on the second Sunday in May

    C. on the fourth Thursday in November

    D. on the third Sunday in June

4. How many kinds of holidays are mentioned in the passage ?

    A. Six.                    

    B. Seven.

    C. Eight.                  

    D. Nine.                                                        ..

5. The best title of the passage is "_____"

    A. Countries in the World

    B. The Meanings of the Holidays

    C. Holidays in Different Countries

    D. The Dates of Some Holidays