工形梁的变形分为角变形，（）几种. A.拱变形 B.旁弯变形 C.凸变形 D.凹变形 发布时间：2018-02-06 14:06 │ 来源：www.tikuol.com 题型：多项选择题 问题： 工形梁的变形分为角变形，（）几种.A.拱变形B.旁弯变形C.凸变形D.凹变形
题型：多项选择题 完形填空。 Food is everywhere in our lives. There are advertisements for food 1 on TV and in magazines. It's not surprising that many people eat three big 2 a day, and then they have lots of snacks 3 . Doctors say that people 4 eat like pigs. They should eat like birds! It's good for you to have four or five small meals a day. You should eat small amounts of food by taking small bites while eating. It can be 5 for you to eat two or three big meals a day, but these food habits are very 6 to change. Some people never change their eating habits. Other people are 7 to change. When they go to a restaurant, they 8 boiled (煮熟的) fish or chicken, and vegetables. They don't eat a rare steak (牛排) and sour cream. Doctors say that boiled food are good for people. They are better than fried foods. Sometimes, people don't have 9 time to think about food. At lunchtime many people run into a fast-food restaurant for lunch and eat a hamburger and French fries. While they are eating, they drink a soft drink. They can eat up a whole meal in 10 20 minutes. This is good for their daily timetable. But it is not very good for their digestive system or their weight! ( )1. A. sometimes ( )2. A. dinners ( )3. A. neither ( )4. A. shouldn't ( )5. A. bad ( )6. A. easy ( )7. A. trying ( )8. A. bring ( )9. A. no ( )10. A. a little B. all the time B. breakfast B. either B. have to B. well B. hard B. try B. order B. any B. more than C. seldom C. meals C. too C. need C. good C. funny C. tried C. choose C. some C. over D. no longer D. lunch D. both D. maybe D. healthy D. nice D. tries D. take D. enough D. less than 查看答案
题型：多项选择题 晴天，常常可以在茂密的树下看到一个个圆形的小亮斑，这些小亮斑是由于______形成的，这些小亮斑是______．一张不透光的纸开一个极小的“△”形 孔，太阳光垂直射到这张纸上，那么这个小孔在地面上产生的形状是______． 查看答案