问题 填空题

小明刚天平和量杯测一块寿山石的密度。在调节天平时,发现指针偏向分度盘的左侧(如图),此时应将平衡螺母向           (选填“左”或“右”)端调。然后用调节好的天平测寿山石的质量,天平平衡时右盘砝码的质量、游码在标尺上的位置如图所示,寿山石的质量为          g,再用量杯测出它的体积为20cm3,则寿山石的密度是                g/cm3

答案

右   53.4    2.67

单项选择题
阅读理解

阅读理解

     From the beginning of human history, wild animals provided food, clothing and sometimes medicine

for man. We may not depend as much on wild animals now. But we hear about them every day.

Americans use the names of animals in many ways. Automobile manufacturers and gasoline companies

especially like to use big cats to sell their products. They like lions, tigers and wildcats. When Americans

say wildcat, they usually mean a_lynx, an_ocelot_or_a_bobcat. All these cats attack quickly and fiercely.

So wildcats represent something fast and fierce.  

     An early American use of the word wildcat was quite different. It was used to describe members of

Congress who declared war on Britain in 1812. A magazine of that year said the wildcat congressmen

went home. It said they were unable to face the responsibility of having involved their country in an

unnecessary war.

     Wildcat also has been used as a name for money in the 1800s. At that time, some states permitted

banks to make their own money. One bank in the state of Michigan offered paper money with a picture

of a wildcat on it. Some banks, however, did not have enough gold to support all the paper money they

offered. So the money had little or no value. It was called a wildcat bill or a wildcat banknote. The

banks who offered this money were called wildcat banks. A newspaper of the time said those were the

days of wildcat money. It said a man might be rich in the morning and poor by night.

     Wildcat then was also used for an oil well or gold mine that had almost no oil or gold in it. Dishonest

developers would buy such property. Then they would sell it and leave town with the money. The

buyers were left with worthless holes in the ground.Today, wildcat oil wells are in areas that are not

known to have oil.

1. What is the main idea of the passage?

A. Wildcats and their stories.

B. Wildcats and their characters.

C. Varieties of animal species.

D. Relationship between animals and humans.

2. From the passage we can know that__________.

A. wildcats represent the state of Michigan

B. the use of wildcats was not always the same

C. wildcats are the best friend of human beings

D. honest developers never buy wildcat oil wells

3. The underlined words "a lynx, an ocelot or a bobcat" in Paragraph 1 may refer to "__________".

A. gasoline companies

B. automobile manufacturers

C. names of wildcats

D. brands of automobile

4. Which of the following would people like to have or trust according to the passage?

A. Wildcat congressmen.  

B. Wildcat oil wells.

C. Wildcat banks.  

D. Wildcat cars.

5. It can be inferred that during the days of wildcat money__________.

A. people couldn't buy anything with the money

B. people didn't know how to save money

C. the rich invested too much on oil wells

D. people complained and suffered a lot