问题 选择题

关于速度、速度变化量、加速度,正确的说法是

A.运动物体的速度变化量越大,它的加速度一定越大

B.某时刻物体速度为零,其加速度也一定为零

C.速度很大的物体,其加速度可能很小,也可能为零

D.加速度越越小,而速度可能会越越大

答案

CD

题目分析:速度是物体运动的快慢,而加速度是描述物体运动快慢的物理量,速度变化量,而加速度,加速度大小等于速度变化量与时间的比值,而不是只有速度变化量决定,选项A错。加速度描述速度变化快慢,和速度大小无关,所以某时刻速度为零时加速度不一定为零选项B错。速度很大的物体,加速度大小不确定,也可能很小也可能为零选项C对。加速度越小表示速度变化越慢,但是速度是增加的慢还是减小的慢不确定,选项D对。

阅读理解

阅读理解。

        When the sun is up in Amsterdam, the largest city in the Netherlands sits quietly on the Amstel River .You can rent a bicycle, visit the Van Gogh or Anne Frank museum, or take a water taxi.

        But when the sun goes down, the party begins. In the big clubs and in coffee shops, tourists gather to

hang out, talk politics and smoke.

        Several areas of the city clearly show the two worlds that rule Amsterdam. And they are all within a

short cab ride of each other.

        For example, Dam Square attracts daytime sightseers to its festivals, open markets, concerts and

other events. Several beautiful and very popular hotels can be found there. And there is the Royal Palace

and the Magna Plaza shopping mall.

        But as evening descends on Dam Square so do the party-seeker. Hip pop or funk music begins

blaring from Club Paradiso and Club Melkweg. These are two of the most popular clubs in Europe. So if

you come, be ready to dance. The clubs don`t shut down until 4 am.

        And while you are there, check out the various inexpensive ways to tour the city. Don`t worry about

getting lost. Although Dutch is the official language, most people in Amsterdam speak English and are

happy to help you with directions.

        And you will notice that half the people in streets are on bicycles. They rent for US $17 to $20 for

a whole day.

        Amsterdam also has a good canal system. From anywhere between US $2 and $9.50, you can use

the canal bus or a water taxi to cruise the “Venice of the North”.

        You can take in the picturesque canal house architecture: The rows of neat, narrow sour-story

dwellings of brownstone with large windows are well worth seeing. Many of them are several centuries

old.

        You might also want to jump out of the canal bus at the Museum Quarter and start walking.

Masterpieces by Dutch artists such as Rembrandt, Bruegel, Van Gogh and others are on display at the

Van Gogh Museum, Rembrandt House and others.

        The city has an appreciation of its historic post. One place to visit is the Anne Frank House in Nine

Streets. It was there that the young Jewish girl wrote her famous diary during World War II. Visitors can

see original diary and climb behind the bookcase to the room where she and her family hid from the Nazis

for two years.

1. At the beginning of the passage, the author indicates that______.

A. Amsterdam is generally known as a quiet city

B. Amsterdam presents two different pictures

C. Parties go on all day long in Amsterdam

D. Amsterdam attracts many daytime visitors

2. Which tourist attraction is mentioned in detail in Paragraphs Four and five?  

A. Royal palace.  

B. Club Paradiso.  

C. Dam Square.      

D. Magns Plaza.

3. What is the author`s purpose in writing the passage?  

A. To share his experiences with readers  

B. To list the places of interest in Amsterdam  

C. To introduce the residents life in Amsterdam  

D. To attracts people to visit Amsterdam

4. According to the passage, the local people have all the following characteristics EXCEPT_______.  

A. they are party goers        

B. they show hospitality  

C. they can speak English      

D. they are fond of cycling

5. Which of the following words can best describe Amsterdam as a tourist city?  

A. Modern    

B.Quiet      

C. Delightful  

D. Historic

单项选择题