问题 填空题

如图所示,物体的长度是        cm,弹簧秤的示数是     N.

答案

(1)1.15;(2)1.9.

题目分析:①使用刻度尺测量物体长度之前,要明确其分度值;测量物体长度时,要观察是否从0刻度线量起,起始端没从0开始,要以某一刻度当作“0”刻度,读出末端刻度值,减去前面的刻度即为物体长度,注意刻度尺要估读到分度值的下一位.

②读取弹簧测力计示数时,要明确其分度值.读数时视线与指针所在刻线相垂直.

解:

(1)刻度尺上1cm之间有10个小格,所以一个小格代表的长度是0.1cm=1mm,即此刻度尺的分度值为1mm;物体左侧与1.00cm对齐,右侧与2.15cm对齐,所以物体的长度为L=2.15cm﹣1.00cm=1.15cm.

(2)弹簧测力计上1N之间有10个小格,所以一个小格代表0.1N,即弹簧测力计的分度值为0.1N.此时的示数为1.9N.

故答案为:(1)1.15;(2)1.9.

点评:物理测量中有很多的测量工具,刻度尺、秒表、电流表、电压表、天平、量筒、弹簧测力计、温度计等,任何一种工具,一定要注意每一个大格和每一个小格各代表多少.刻度尺需要估读,其他的测量工具不需要估读,读出最接近的数值.

阅读理解

It was a dark and cold night. The car driver didn’t have even one passenger all day. When he went by the railway station, he saw a young man coming out with two bags in his hands. So he quickly opened the door of the car and asked, “Where do you want to go, sir?”

“To the Star Hotel,” the young man answered. When the car driver heard that, he didn’t feel happy. The young man would give him only three dollars because the hotel was not far from the railway station. But suddenly, he had an idea. He took the passenger through many streets of the big city.

After a long time, the car finally arrived at the hotel. “You should pay me fifteen dollars,” the car driver said to the young man. “What! Fifteen dollars? Do you think I’m a fool? Only last week I took a car from the railway station to this same hotel and I only gave the driver thirteen dollars. I know how much I have to pay for the trip. I won’t pay you one dollar more than I paid to the other car driver last week. ”

73. Which of the following is true?____________

A.    The young man went past the railway station.

B.    The young man was working in the railway station

C.    The young man had just got off a train.

D.    The young man was waiting for his friend there.

74. The driver felt very _________ when he saw the young man coming out of the railway station.

A.    sad         B. sorry        C. happy       D. worried

75. The driver took the passenger through many streets so as to_________.

A.    make the young man happy

B.    let the young man think it was very far from the station to the hotel.

C.    Let the young man have a good look at the city.

D.    Get more than twenty dollars.

多项选择题