举例说明潮间带岩石礁群落演替实验过程有哪些? 发布时间:2019-03-13 08:04 │ 来源:www.tikuol.com 题型:问答题 论述题 问题: 举例说明潮间带岩石礁群落演替实验过程有哪些?
题型:问答题 论述题 从2014年1月1号开始,作为最有希望成为美国总统奥巴马最后一个任期结束时留下的“政治遗产”——美国医疗保险改革法案开始全面实施。从最初在国会勉强过关,到因涉及联邦与州权力的分配问题而引发诉讼,涉险赢得最高法院“不违宪”的裁决,再到引发两党恶斗、导致政府关门,医改法案自提上议程之日起就饱受争议、屡遭挫折。2月10日,最新“变数”又传出——美国政府宣布推迟“医改法案”中关键条款的强制实施日期。结合材料,分析美国总统的医改政策屡遭挫折的原因。(12分) 查看答案
题型:问答题 论述题 下图是“PPE怪圈”,是指贫困(Poverty) 、人口(Population) 和环境(Environment) 之间形成的一种互为因果的关系。阅读“PPE怪圈”材料,回答1~2题1.图中a、b、c、d四点所代表人口增长状况中,最有可能产生“PPE怪圈”的是( )A.a B.b C.c D.d 2.下列国家中,目前基本不存在“PPE怪圈” 的是( )A.中国 B.印度 C.巴西 D.日本 查看答案
题型:问答题 论述题 完型填空。 I was very fond of hunting when I was a young man. In the autumn of 1915, I was 1 in the northwest of India. One evening, after hunting in the forest all 2 , I was returning alone to the place where I had 3 up my tent. I was tired 4 hungry. It was getting 5 and darker, and I was walking slowly 6 a narrow path. On my right was a wide river; on my left, a 7 , dark forest. All of a 8 , I saw two green eyes looking at me from among the trees. I knew it 9 be a man-eating tiger. The tiger was getting ready to 10 on me. My heart 11 . What could I do? Should I jump 12 the river and hope to save my life 13 swimming? I looked to the 14 . In the river there was a 15 crocodile waiting to welcome me with its mouth 16 open. I was so 17 that I shut my eyes. And I thought it would be the end of my 18 . I heard branches moving 19 the tiger roared (咆哮) and jumped. 20 then I opened my eyes. What do you think had happened? The tiger had jumped right over me and now in the jaws (嘴) of the crocodile. ( )1. A. practising ( )2. A. day ( )3. A. turned ( )4. A. but ( )5. A. colder ( )6. A. by ( )7. A. thick ( )8. A. shock ( )9. A. could ( )10. A. live ( )11. A. beat ( )12. A. across ( )13. A. on ( )14. A. front ( )15. A. big ( )16. A. long ( )17. A. tired ( )18. A. work ( )19. A. though ( )20. A. Just B. study ing B. night B. put B. and B. warmer B. beside B. strong B. joy B. can B. depend B. sank B. over B. of B. back B. small B. short B. excited B. study B. as B. Even C. p lanting C. the time C. made C. or C. brighter C. along C. tall C. sudden C. must C. look C. ached C. into C. with C. left C. dead C. wide C. frightened C. day C. but C. Still D. travelling D. the year D. brought D. n or D. latter D. on D. short D. surprise D. should D. jump D. jumped D. from D. by D. right D. dying D. narrow D. surprised D. life D. or D. Only 查看答案