题型:判断题 下列事实与胶体无关的是( ) A.水泥厂和冶金厂常用高压直流电除去大量烟尘,减少对空气的污染B.将NaCl研磨成直径在1~100nm的颗粒然后分散于水中形成的分散系C.一束平行光线射入蛋白质溶液里,从侧面可以看到一条光亮的通道D.氢氧化铁胶体中滴入稀硫酸,先看到红褐色沉淀生成而后沉淀溶解 查看答案
题型:判断题 完形填空。 Many years ago, I owned a service station and roadhouse on the main road between Melbourne andAdelaide. One very cold, wet night at about 3:30 a.m., there was a 1 on the front door of our house. A youngman, wet from 2 to toe, explained that he had 3 out of petrol about 30 km up the road. He had left his pregnant (怀孕的)wife and his two children 4 at the car and said that he would hitchhike (搭便车) back. Once I had 5 a can with petrol, I took him back to his car where his two-year-old and four-year-old children were both 6 , saying that they were cold. Once the car had started, I suggested that he 7 me back. Before leaving, I had turned the heater 8 in the roadhouse, so that when we went in, it was nice and 9 . While the little ones played and ran 10 , I prepared bread and butter for the children, and hot chocolate for the 11 . It was about 5 a. m. before they 12 . The young fellow asked me how much he 13 me and I told him that the petrol pump (加油泵) had 14 $ 15. He offered to pay "call-out fee", but I wouldn't accept it. About a month later, I received a 15 from interstate, a large bus company that we bad been trying to 16 to stop off at our roadhouse for a long time, It 17 out that the young fellow I had helped was its general manager, the most 18 person in the company. In his letter, he thanked me again and 19 me that, from then on, all their buses would stop at my service station, In this 20 , a little bit of kindness was rewarded with a huge amount of benefits. ( )1. A. kick ( )2. A. finger ( )3. A. driven ( )4. A. away ( )5. A. supplied ( )6. A. sleeping ( )7. A. allow ( )8. A. on ( )9. A. heat ( )10. A. around ( )11. A. drivers ( )12. A. left ( )13. A. gave ( )14. A. appeared( )15. A. call ( )16. A. get ( )17. A. pointed ( )18. A. generous( )19. A. praised ( )20. A. lesson B. hit B. shoulder B. used B. behind B. poured B. crying B. ring B. off B. hot B. inside B. guests B. arrived B. paid B. exhibited B. letter B. force B. turned B. successful B. persuaded B. business C. beat C. head C. come C. over C. equipped C. quarrelling C. lead C. in C. warm C. nearby C. customers C. ate C. owed C. calculated C. check C. require C. worked C. serious C. informed C. aspect D. knock D. hand D. run D. out D. filled D. fighting D. follow D. over D. attractive D. along D. adults D. disappeared D. offered D. shown D. notice D. hope D. found D. powerful D. convinced D. case 查看答案
题型:判断题 读下图,回答1—3题。1、图示I、Ⅱ、Ⅲ三大自然区划分的依据是[ ]A.土壤和植被B.水文与植被C.地貌与气候D.地貌与水文2、有关I、Ⅱ、Ⅲ三个自然区的叙述,正确的有[ ]A.Ⅱ区比Ⅲ区纬度高,故热量较Ⅲ少B.Ⅲ区比Ⅱ区纬度低,故太阳光照比Ⅱ区强C.Ⅲ区与I区南部距海远近不同,故以400mm等降水量线为两区界线D.Ⅱ区比I区北部降水少,故以400mm等降水量线与I区北部为界3、关于三大自然区的叙述,错误的是[ ]A.东部季风区内部差异的形成以热量为基础B.西北干旱半干旱区内部差异的形成以水分为基础C.青藏高原的垂直差异主要随海拔的升高而发生变化D.三大自然区存在内部差异均以热量的变化为基础 查看答案
题型:判断题 下列说法正确的是()①美国、日本、欧洲西部多为发达国家②中国、印度、巴西、南非基础四国为发展中国家③习惯上把发达国家与发展中国家之间的对话成为南南合作④习惯上把发展中国家之间的互助合作成为南北对话A②④B①③C①②D③④ 查看答案