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【单选题】
如图所示,一圆盘绕通过O且垂直于盘面的水平轴转动,轴间摩擦不计。两颗质量相同、速度大小相等、方向相反且沿同一直线运动的子弹,同时射进圆盘并留在,则两子弹射入后的瞬间,圆盘和子弹系统的角动量 及圆盘的角速度 将会
A.
不变, 增大
B.
不变, 减小
C.
增大, 减小
D.
增大, 增大
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举一反三
【简答题】第三部分任务型阅读(共两节,满分35分) The history of Chinese calligraphy is probably as long as that of China itself. Calligraphy is a special category in China’s world of fine arts. Through the centuries Chinese char...
【简答题】第三部分: 阅读理解 (共两节,满分40分) 第一节(共15小题;每小题2分,满分30分) Part-time Front Desk Position Kirchoff, Inc., a book development company, is looking for a part-time front desk office worker. This position is perfec...
【简答题】第三部分      阅读(共两节;满分30分) 阅读理解(共15小题;每小题2分,满分30分) 阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项, 并在答题卡上将该项涂黑。 (A) Australia, the last continent, was discovered by ships belonging to some European nations in the se...
【简答题】第三部分阅读理解(共两节,满分25分) 第一节(共10小题;每小题2分,满分20分) Research has shown that music has an important effect on one’s body and psyche (心灵). In fact, there is a growing field of health care known as music therapy,...
【单选题】()提出,要加强燃气安全工作,发展各种安全保护装置,各大型燃气企业采用计算机自动化管理的输配调度技术,确保燃气持续安全供应。
A.
《市政公用事业“十一五”专项规划》
B.
《城镇燃气技术规范》
C.
《建设事业技术政策纲要》
D.
《城镇燃气管网泄露检测技术规范》
【单选题】You study hard. [     ]
A.
be supposed to
B.
are supposed
C.
are supposed to
【单选题】You ________ ask the teacher if you want to leave the classroom. [     ]
A.
supposed that
B.
are supposed to
C.
are supposed
D.
are wanted
【简答题】第II卷(非选择题 共35分) 第三部分:写作(共两节,满分35分) 第一节: 阅读表达(共5小题;每小题2分,满分10分) Beauty has always been regarded as something praiseworthy.Almost everyone thinks attractive people are happier and healthier, have better...
【单选题】— What are the people in Korea supposed to do when they meet for the first time? — They are supposed to ____. [     ]
A.
kiss
B.
bow
C.
say hello
D.
shake hands
【简答题】单句改错。 1. You are supposed saying hello to your teacher in the morning. ____________________. 2. I greet to my teacher politely every morning. . 3. I often drop at my English teacher's home on Sunday. ...
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