问题 单项选择题

关于前庭大腺囊肿的描述,正确的是

A.发生于中肾管

B.易发生癌变

C.由于腺管堵塞,分泌物积聚而形成

D.多为双侧

E.好发于绝经前后

答案

参考答案:C

阅读理解

阅读理解。

     Yellowstone is a huge park covering over 3,400 square miles in Wyoming, Montana and Idaho. It can be

reached by air to Cody or Jackson, 50 miles from the entrances (入口) . There is no train service nearby.

Limited (有限的) bus service is used from some of the towns near it. Once in the area, a car is almost a must.

The park has 5 entrances, which are open from May to October . It is a good idea to plan a trip during the

good weather, but except big crowds and show traffic. Parts of the park are open in the winter for snow

sports.

     Be sure to come prepared for different weather at any time of the year. Take enough of your clothing

so you will be prepared for unexpected changes in temperature. Take good walking shoes and thick socks,

if you are going to do any hiking. You can also see the park on horseback.

     If you want to learn about Yellowstone, the National Park Service has many talks, films and tours to

help you to understand it .

1. How large is Yellowstone National Park? 

    ______________________________________________

2. What is a must if you are in the area?

    ______________________________________________

3. Why are parts of the park open in winter?

    ______________________________________________

4. What do you need to take while going to do any hiking?

    ______________________________________________ 

5. Where can you find more information about Yellowstone? 

    ______________________________________________

多项选择题