题目

利用容积为10cm3的注射器、弹簧测力计和刻度尺可粗略测出大气压的值。 （1）实验的原理是_____； （2）把注射器的活塞推到注射器筒的底端，这样做的目的是_____，然后用一个橡皮帽封住注射器的小孔； （3）如图所示，水平向左缓慢匀速拉动注射器筒，当注射器的活塞_____时，记下弹簧测力计的示数为19N； （4）用刻度尺测出注射器_____长度为5cm，这样就不用测活塞的直径也能算出活塞横截面积； （5）则大气压的值为_____Pa； （6）提出提高该种测量Hundreds of years ago, news was carried from place to place by people on foot or by horse. It took days, weeks and sometimes months for people to receive news. Now it is possible to send words and pictures around the world in seconds(秒). Billions of people learn about news stories of their own country and all over the world every day, either by watching TV or reading newspapers. Newspapers have been an important part of everyday life since the 18th century. Many countries have hundreds of different newspapers. How do newspaper editors(编辑) decide which news stories to print (印刷)? Why do they print some stories and not others? What makes a good newspaper story?                                                           Firstly, it is important to report new stories. TV stations can report news much faster than newspapers. Yet, newspapers give more about the same story. They may also look at the story in another way, or they may print completely (完全地) different stories to those on TV. Secondly, a news story has to be interesting and unusual. People don’t want to read stories about everyday life As a result, many stories are about some kind of danger and seem to be "bad" news. For example, newspapers never print stories about planes landing safely, instead they print stories about plane accidents. Another factor(因素) is also very important in many news stories. Many people are interested in news in foreign countries, but more prefer to read stories about people, places and events (事件) in their own country. So the stories on the front page in Chinese newspapers are usually very different from the ones in British, French and American newspapers. 小题1: According (根据) the passage, how do people learn about news stories in the world now?A．They carry news stories and tell others from place to place oh foot or by horse. B．They tell each other what they have seen with their eyes. C．They watch TV or read newspapers. D．They listen to the radio every day.小题2:  The difference between newspaper stories and TV news reports is that    . A．people can learn more about the same news story from a newspaperB．people can read the news story more quickly in a newspaperC．people can read news stories in other countries D．people can read news’ stories about their own country小题3: To make a good newspaper story, how many factors does the passage talk about?A．Two.B．Three.C．Five.D．Six.小题4:According to the passage, which of the following can you most possibly watch on TV?A．You often play football with your friends after school. B．Your teacher has got a cold. C．A tiger in the city zoo has run out and hasn’t been caught. D．The bike in the front of your house is lost.小题5:Which of the following is Not True of this passage?A．News stories on the front page of every country are always the same. B．People like to read interesting and unusual news. C．Not only TV but also newspapers can help people to learn what is happening around the world. D．Newspapers have been an important part of everyday life for more than three hundred years.