如图所示，一只机动船从A点出发渡河，如船身垂直于河岸划行经4 min到达对岸的C

发布时间：2017-05-22 07:17 │ 来源：www.tikuol.com

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问题：

如图所示，一只机动船从A点出发渡河，如船身垂直于河岸划行经4 min到达对岸的C点；如船身河岸上游成某一角度航行，经5 min钟恰到达正对岸的B点。已知河水向右流，且水的流速恒定，BC＝120m。则水的流速为_____________；河宽AB应是______________。

考点：运动的合成与分解

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完形填空。
Once, in a small village, lived a family with eight children. Two of the children loved 1 very much. But the family was so poor that it was impossible to send 2 of them to study at the art college at the same time. After many discussions, the two boys finally 3 a plan. They would toss (抛) a coin. The loser would go 4 into the mines (煤矿) and, with his earnings (赚得的钱), 5 his brother studying at the college. Then, when the brother who won the toss finished his studies, after four years, he would support the other brother studying at the 6 . James won the toss and Jack went down into the mines. James worked with all his heart and his paintings were much 7 than those of most of his teachers, and by the time he 8 , he was beginning to make a lot of money for his paintings. 9 James returned, the family held a big dinner for his great success. Soon after the meal began, James 10 up from his seat to drink a toast (举杯祝酒) to his dear 11 . He said, "Jack, now you can go to the art college and your 12 will come true. I will take care of you. " But Jack said 13 , "Brother, the four years in the mines has done too much to my hands, so it's too 14 . Now I can't even hold a glass. " To show his great love and respect, James drew his brother's hands with 15 towards the sky. He called his drawing "The Praying Hands" , which became very famous years later.
( )1. A. painting ( )2. A. any ( )3. A. looked out ( )4. A. off ( )5. A. support ( )6. A. home ( )7. A. better ( )8. A. arrived ( )9. A. Before ( )10. A. picked ( )11. A. brother ( )12. A. way ( )13. A. happily ( )14. A. early ( )15. A. legs	B. books B. all B. worked out B. away B. agree B. mine B. worse B. graduated B. When B. turned B. sister B. idea B. surprisedly B. late B. feet	C. school C. both C. took out C. up C. follow C. college C. cheaper C. walked C. Though C. looked C. father C. dream C. angrily C. good C. arms	D. money D. neither D. got out D. down D. let D. school D. older D. waited D. While D. stood D. mother D. practice D. softly D. helpful D. fingers

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月饼的英语怎么说？

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下列措施中属于明清时期加强专制统治的有： ①明太祖废除丞相 ②雍正帝设立军机处

③实行八股取士 ④缔结“澶渊之盟”

A．①②③④

B．①③④

C．②③④

D．①②③

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(假设信息)如果经各种检查尚不能确诊，考虑细菌性感染，但仍不除外结核，其临床处理以哪项选择最合理

A．先针对细菌感染，经验性应用抗生素治疗

B．因为抗结核治疗特异，高效，先试抗结核治疗

C．抗生素加支持疗法

D．抗结核与抗生素治疗同时进行

E．抗生素联合抗真菌药物治疗

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滚动轴承的核心元件是（），它使相对运动表面间的滑动摩擦变为滚动摩擦。

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