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问题 选择题

下列各组中的三种物质，颜色彼此相同的一组是（　　）

A．氢气、氧气、液态氧

B．硫、铁、锌

C．四氧化三铁、氧化汞、高锰酸钾

D．氯酸钾、氯化钾、五氧化二磷

答案

A、氢气、氧气是无色气体，液态氧是淡蓝色液体，故A错误；

B、硫是淡黄色固体，铁和锌银白色金属，故B错误；

C、四氧化三铁是黑色固体，氧化汞是红色粉末，高锰酸钾是紫黑色固体，故C错误；

D、氯酸钾、氯化钾、五氧化二磷都是白色固体，故D正确．

故选D．

阅读理解

If you go to England, you may want to visit Big Ben. Big Ben is not the name of a man but a name of the clock in London. It has a long history of about 150 years. It is at the north end of the Palace of Westminster（威斯敏斯特）. The big clock has four faces. So you can read the face of the chock everywhere.The hands of it are about four meters（米）long.When the new year comes, it chimes to welcome the start of the new year. There are also many fireworks over the clock tower.

The big clock makes a very loud sound “Ding dong.Ding dong”-the clock gives the sound every 15 minutes of an hour.

小题1:Ｗhat is Big Ben?

A．A man

B．A tower

C．A clock

D．A plane小题2:How long are the hands of Big Ben?

A．2 meters

B．4 meters

C．15 meters

D．16 meters小题3:Which of the following is True about Big Ben?

A．It has three faces.

B．It’s in the UK.

C．It gives the sound every 30 minutes

D．It is about 200 years old.小题4:What dose the underlined word chimes mean?

A．微笑

B．报时

C．呐喊

D．跑步小题5:What’s the best title（标题）of the passage？

A．The clock tower

B．The palace of the westminster

C．Clock hands

D．Big Ben
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填空题

纤维的服用性能包括（）性能、（）性能、（）和保养性。
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