问题 多项选择题

如图所示,轻质弹簧下挂重为300N的物体A,伸长了3cm,再挂上重为200N的物体B时又伸长了2cm,弹簧均在弹性限度内若将连接A、B两物体的细绳烧断,使A在竖直面内做简谐运动,下列说法中正确的是()

A.最大回复力为300N

B.最大回复力为200N

C.振幅为2cm

D.振幅为5cm

答案

参考答案:B, C

阅读理解

阅读理解。

     When you come to Auckland as a foreigner, you'll easily find a traditional pub (酒吧) either in small

towns or in big cities. In these pubs many different kinds of drinks such as wine, beer, coke, coffee, and

juice are served. You can find out the local culture. However, if you don′ t know the pub culture, you may

feel embarrassed or even get into trouble.

      Most pubs in Auckland have no waiters, so you have to go to the bar to get your own drinks. Those

who don't know this may wait a very long time before they realize they would have to fetch their own

drinks. While you are standing in front of the bar waiting for service, you are able to chat with others who

are also waiting for service. The bar counter (柜台) is possibly the only place you can find in Auckland to

talk friendly with strangers. But while you are chatting with others or talking about what you want to order,

you mustn't block all the entrance to the bar.

     Remember, you'll never go into the pubs unless you are over 18.

1. A traditional pub in Auckland is very ______. [ ]

A. friendly

B. embarrassed

C. relaxing

D. Both A and B

2. When you are in pub, ______. [ ]

A. you will have a better service with a lot of waiters around

B. you will have to order and fetch your own drinks all by yourself

C. it is easy for you to make friends with others by chatting or talking

D. You'll have to take time to wait for your drink 

3. Which sentence is true?  [ ]

A. It is very hard for you to find a traditional pub to relax yourself in Auckland

B. You aren't allowed to get into the pubs until you are over18

C.You are able to order any of the drinks or foods in the pubs

D. You can chat or talk with friends in any places in the pub

4. Which topic is the best for this passage?  [ ]

A. Service in Auckland's Pubs.

B. Pub Culture in Auckland

C. Making Friends in Pubs.

D. How to Order Drinks in Pubs.

5. Most pubs in Auckland have______. [ ]

A. many waiters

B. a waiter

C. no more than 10 waiters

D. no waiters

单项选择题