下列对战术训练要求叙述有误的是() A.突出全面、注意实效 B.分类分级、分步施训 发布时间:2018-10-14 10:46 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下列对战术训练要求叙述有误的是()A.突出全面、注意实效B.分类分级、分步施训C.针对多样装备、强化战术合成D.针对险恶情况、提高实战能力
题型:单项选择题 (12分)下表是短周期中部分元素的原子半径及主要化合价。元素代号WRXYZ原子半径/nm0.0370.1570.0660.0700.077主要化合价+1+1-2-3,+5+2,+4请回答:(1)Z在元素周期表中的位置是 ,Z单质与Y的最高价氧化物对应水化物的浓溶液反应可生成一种红棕色气体,则反应的化学方程式为 。(2)实验室制取YW3的化学方程式为 。(3)R2X2与W2X反应的离子方程式为 ,若反应中转移的电子数为0.4×6.02×1023,则参加反应的R2X2的质量为 。(4)X与Z组成一种有臭味的气体,与氧气按物质的量之比为1:2混合后恰好完全燃烧,生成稳定的氧化物,在同温同压下测得燃烧前后气体的总体积不变,则该反应的化学方程式是 。 查看答案
题型:单项选择题 完形填空。 When I was eight, I attended school in Bath, England. It was a 1 school made up of four classrooms altogether, 2 about 25 children in each one. For the most part, one teacher was 3 teaching all of the subjects in each class. 4 , Mr Ronald Broaches, the headmaster, would 5 inand teach some subjects. Although he was quite strict with the students, he had an excellent sense of 6 . Many of the children were 7 by him because he was a very good man. In my own 8 , he took a great interest in me when he 9 that I enjoyed doing puzzles. He would often stop me as I was going to class and 10 me a piece of paper, often with a mathematical or logical puzzle on it. 11 time went by, the puzzles gradually got more difficult, but I 12 them. They served to show methat 13 activity was fun and rewarding when the correct 14 were found. Even today I can still 15 Mr. Broackes' joyful exclamation (感叹) of"Well done!" whenever I worked out a puzzle. This simple 16 with a man whom I admired greatly has had a deep influence on my life. I shall forever be 17 that our paths crossed. Mr. Broackes 18 just two weeks after I won the Nobel Prize in Medicine. 19 , I had no chance to speak with him before his death. I learned later that he had heard about my 20 . I will always wish that he knew what a deep influence he had on my life. ( )1. A. famous ( )2. A. by ( )3. A. responsible for ( )4. A. Always ( )5. A. like ( )6. A. shame ( )7. A. persuaded ( )8. A. plan ( )9. A. stressed ( )10. A. buy ( )11. A. Before ( )12. A. copied ( )13. A. spiritual ( )14. A. answers ( )15. A. imagine ( )16. A. greeting ( )17. A. grateful ( )18. A. retired ( )19. A. Actually ( )20. A. improvement B. small B. on B. interested in B. Suddenly B. discuss B. safety B. influenced B. example B. discovered B. lend B. If B. loved B. physical B. puzzles B. expect B. interaction B. surprised B. died B. Accidentally B. movement C. high C. with C. crazy for C. Meanwhile C. ignore C. humor C. rewarded C. future C. insisted C. give C. Unless C. guessed C. simple C. ideas C. remember C. friendship C. sorry C. moved C. Unexpectedly C. achievement D. traditional D. for D. tired of D. Occasionally D. come D. honor D. controlled D. case D. thought D. send D. As D. opened D. intellectual D. numbers D. create D. satisfaction D. excited D. appeared D. Unfortunately D. management 查看答案
题型:单项选择题 将下图所列仪器组装为一套实验室蒸馏石油的装置,并进行蒸馏,得到汽油和煤油.(1)图中A、B、C三种仪器的名称是___________.(2)将以上仪器按(一)(六)顺序,用字母a,b,c…表示连接顺序:e接( )( )接( )( )( )接( )( )接( ).(3)A仪器中c口是___________,d口是___________(填“进水口”或“出水口”)(4)蒸馏时,温度计水银球应在___________位置.(5)在B中注入原油后,加几片碎瓷片的目的是____________________________.(6)给B加热,收集到沸点60℃~150℃间的馏分是___________,收集到150℃~300℃间的馏分是___________. 查看答案