题目

在如图10所示的装置中，两物体通过一段绳与两个滑轮连在一起，质量分别为m1、m2，悬点a、b间的距离远大于滑轮的直径，不计一切摩擦，整个装置处于静止状态．由图可知                                                                                                             ( ) 图10 A．α一定等于β                              B．m1一定大于m2 C．m1一定小于2m2             There are five children talking about the seasons.SimonI like winter because I live in Israel. In winter it's rather warm and sometimes gets even close to 30°C, but never as hot and wet as in summer.DanielSummer is the best,by far. I like the heat,the beach and the sunshine. I spend lots of time outdoors in summer. Winter is the worst, I think, as there is nothing good but cold.SandyAny season is okay but winter. I hate cold; I bate snow; and I really hate having to wear a coat. In winter everything is white and gray. I miss the green.AmyIn spring, temperatures are nice. I'm excited to fish because the winter is gone. I also like summer because I can go swimming in my big pool. And baseball season starts. All of us will have a good time for this wonderful game.PeterSummer is too hot and winter is too cold. Spring is okay but we get some storms. So autumn is my favourite season. It has warm days and cool nights. The leaves are turning to very beautiful colours; the squirrels are running, trying to gather up all of the nuts; apples are fresh.1.Simon's favourite season is________ .A. spring B. summerC. autumn D. winter2. doesn't like winter.A. Daniel and Sandy B. Simon and sandyC. Simon and Peter D. Simon and Peter3.Amy likes in spring.A. going swimming B. flying kitesC. going fishing D. playing baseball4.Peter thinks that__________.A. autumn is a nice season B. there is too much rain in autumnC. it snows a lot in winter D. squirrels like fresh apples5.Which one is TRUE?A. Daniel doesn't like the hot weather. B. It is not cold in winter in Israel.C. Sandy hasn't seen the snow. D. The five children live in the same city.