2022-10-10
6B【解析】设小球的重力为G,圆环沿顺时针方向转动过程中,OP与竖直方向的夹角为a时,OP和OQ的拉力大小分别为T1、T2。由题意可知,小球的位置保持不动,受力保持平衡,由平衡条件可知,两绳拉力的合力不变,运用三角形定则作出力的合成图,如图小球受到的重力G和T1、T2组成一个闭合的三角形。由几何知识可知,T1、T2的夹角保持不变,为60,由正弦定理得1m0-=面=如如解得72=如c=,n
2022-10-10
第二节61. culturally62 which63. for64 have achieved65. speakers66. The67. makes68. rewarding69. to go70. fluency 第一节短文改错Screen use among kids had exploded over the pasthasdecade. Many people are
2022-10-10
【答案】B【详解】由题意A={x|x>0}=(0,+∞),B={|y≥-1=[-1,+∞),a2A=(-∞,0所以(Q2A)∩B=[-1,0],故选:B X.句型转换(共5小题;每空1分,满分10分)71. cheaper; other 72. filled with 73. Dont play 74. Did; anything 75. What; need
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re going to get back可知, Billy Shelby相信正能量61. exploring/exploration 62. farther/further 6a writteh: 64, has remained 65. by 66.themselves67. widely 68 collection 69. when: 70.a 19.(1)①立足实践,在实践中
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第二节书面表达Dear DavidI'm delighted to have been invited to your wonderfulfamily party last weekend. I'm writing to express mysincere gratitudeI'm grateful that everybody in your family was soenthusia
2022-10-10
54.B55.D56.C57.A 63. Her dream was to become a volunteer firewoman./ To become a volunteer firewoman64. Three. Three women. /There are three women65. Because she is always glad to do anything
2022-10-10
10.B【解析】本题考查理解文言文实词、虚词和文言句式的能力。原文标点:世充据东都,府库盈衍,其兵皆江淮选卒,正苦乏食尔,是以求战不得,为我所持。今建德身总众以来,必飞毂转粮,更相资哺。11.C【解析】本题考查了解并掌握常见的古代文化知识的能力。应为“有公、侯、伯、子、男五种爵位”12.C【解析】本题考查筛选文中信息、归纳内容要点的能力。“秦王及其部将准备退军”错原文是“诸将争言敛军以观
2022-10-10
21.①语序不当,改为“发布并实施”;②成分残缺,在“营造”前加“为”;⑤句式杂糅,去掉“的原因”;⑧搭配不当,“培训”改为“培育”或“培养”。(每处1分) 50.B51.A52.D53.C 以上就是英语周报 2018-2022 七年级席玉虎33答案,更多英语周报答案请关注本网站。
2022-10-10
24252627B DAA 8.D【解析】本题考查函数的性质,考查运算求解能力与推理论证能力由题意可得f(x+2)=f(-x+2),所以f(5)=f(3+2)=f(-3+2)=f(-1)=-f(1)=-(2-1)=-7 以上就是英语周报2021-2022二十七期答案,更多英语周报答案请关注本网站。
2022-10-10
4.【答案】A【解析】由已知得sina√32为第二象限角,∴cosa=tana/ 3,. tan22tan23=3,故选A 10.C(原文标点:开皇之日,属车十有二乘,于事亦得。今八十一乘,以牛驾车,不足以益文物。朕欲减之,从何为可?)11.A(爵位依次分为公、侯、伯、子、男五等)12.C(皇上的意愿是大力装备天子车驾,裁减侍从车辆,阎毗关于此事的建议也没有被否决)13.(1)多次
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