题目

可以用时间与路程的比值表示运动的快慢，0.1s/m比0.2s/m（填“快”或者“慢”），同一物体可以说它是运动的也可以说它是静止的，是由于不同． 答案：【1】快【2】参照物 阅读理解 　　Shelly Nielsen sees students fall asleep in class at least twice a week．“When I see teens asleep in my class, I wonder if I am really that boring”, said Nielsen, a teacher．“I also wonder why they are so tired．”Neilson first tried to wake up sleeping students quietly．If the snoozing(呼噜声)continues, she may call a student's parents to find out how much sleep the students is getting at night and why． 　　According to a research, teens need at least nine hours of sleep to function properly during the day．And more than 90 percent of teens say they are sleeping less than that each night． 　　“The big problem is the social demand for homework, video games and friends．Teens don't understand how important sleep is．”said Dr．Carl Lawyer, a specialist． 　　Rebecca Lucas, another teacher agrees．“Teens are busy,”she said,“many activities force them to get home pretty late．When I see teens sleeping in my class, I feel sad．I also feel frustrated because I have so much to teach in such a short amount of time and teens sleeping in the class slows me down．” 　　Al Taylor, a teacher says sleeping is not allowed in his class．“When I see a teen sleeping in my class, I feel bad that they didn't get enough sleep but they need to correct it at home,”Taylor said．“I've raised teenage boys myself．Teenagers like to wait to the last minute to do their homework so that they often stay up late trying to finish it．” (1) What does Shelly first do when she finds students sleeping in class? [　　] A． She wakes them up with no punishment． B． She blames(责备)herself for giving a boring lesson． C． She asks them to stand outside． D． She reports it to their parents． (2) Students always feel tired and sleep in class because they ________． [　　] A． have to stay up late to do their homework． B． are attracted by many activities． C． are not interested in the lessons D． are too busy to have enough sleep (3) From the last paragraph, we can infer that Al Taylor ________． [　　] A． can easily lose his temper B． was a father of teenage boys C． has no sympathy(同情)for sleeping students D． finds a good way of giving teens more sleep (4) What is the main idea of the passage? [　　] A． Why sleep is important B． Why teens are so tired C． How students get enough sleep D． How teachers manage sleeping students