问题 选择题
a、b、c三个α粒子从同一点垂直电场方向同时射入偏转电场中,其运动轨迹如图所示,其中b恰好飞出电场,由此可以肯定(  )

A.在b飞离电场时,a刚好打到负极板上

B.b和c同时飞离电场

C.进入电场时,c的速度最大,a、b的速度相同

D.通过电场整个过程,a动能变化最大

答案

答案:A

阅读理解

Reading comprehension.

    Located (位于) in Changle Road on the side of Shanghai Jinjiang Hotel, the "Tang-style Costume Street"

has been enjoying high popularity for its traditional Chinese attire (服装) following the costume pattern of

Tang Dynasty (618-907). Its fame (名声) soared (猛增) higher after the APEC (亚太经济合作组织)

meeting in Shanghai at which Tang-style costumes were offered for APEC leaders.

    On the street are custume shops of various grades and features. Some sell modern costumes with

traditional touch, such as cloth-knotted (用布打结的) buttons and round flower patterns. Others offer 100

percent traditional attire. 

     Most shops sell costumes, so you can enjoy the Chinese costumes. Why are the Chinese costumes so

popular now? It's in touch with the high development of our country. The getting-in-fashion was also owned

to APEC leaders. They all wore Tang-style costumes at Shanghai meeting. This has proved an old saying that

only things of a national touch can prevail (流行) in the world.

Answer the following questions.(阅读短文,回答问题。)

1. Does the Tang-style Costume Street locate in Shanghai?

                                                                                          

2. Where did APEC leaders wear the Tang-style costumes? 

                                                                                          

3. Are the modern costumes with traditional touch in fashion? 

                                                                                          

4. Most shops sell Tang-style costumes, do they? 

                                                                                          

5. What's the old saying for the fashion?

                                                                                          

选择题