羽毛球女子单打先得几分的球员，为胜一局？（）A、9分 B、11分

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问题单项选择题

羽毛球女子单打先得几分的球员，为胜一局？（）

A、9分

B、11分

C、15分

D、21分

答案

参考答案：D

解析：

采用21分制，即双方分数先达21分者胜，3局2胜。每局中羽毛球羽毛球(3张) ，一方先得21分且领先至少2分即算该局获胜，否则继续比赛；若双方打成29平后，一方领先1分，即算该局取胜

填空题

根据提供的首字母或句意将短文补充完整。

Beijing is the (1)c of China. People are always trying to make it better.

In 2001, news came that Beijing would (2)h the 2008 Olympic Games. People began to work

even harder to (3)i the environment.

Today there are more roads and tall (4)b . When you walk around, you can see more trees, grass

and flowers. You can also find cleaner streets. When you (5) up, you often see a blue (6)

and white clouds. Beijing is becoming more and more beautiful.

In (7) , Beijing has changed a lot. We are sure Beijing will have a brighter (8) .

不定项选择

雨滴由静止开始下落（不计空气阻力），遇到水平方向吹来的风，设风对雨滴持续作用，下列说法中正确的是[ ]

A．雨滴质量越大，下落时间将越短

B．雨滴下落时间与雨滴质量大小无关

C．同一雨滴风速越大，着地时动能越小

D．同一雨滴风速越大，着地时动能越大