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【针对训练】 = 1 GB1 ⒈下面的四个实例中叙述错误的是( )A.叉车举起货物叉车做了功B.燃烧的气体使火箭起飞燃烧的气体做了功C.起重机挂着货物沿水平方向匀速移动起重机对货物做了功D.马拉动圆木马做了功 = 2 GB1 ⒉.水平路面上有一个重500 N的小车在100 N的水平拉力作用下匀速向前移动了5 m则在这一过程中( )A.车受到的阻力为600 NB.车受到的
练习四:给下列材料加上数字类的项目符号并将古诗用红色字填写完整
主题句练习题How to read a novel. Anyone can learn how to read a novel. Television is very important.Television plays an educational role in daily life. To improve reading ability one needs to acquire
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段落翻译练习:Earlier this year when American first sneezed the European Central Bank (along with most private-sector economists ) argued that the euro area was insulated from Americas slowdown and had littl
二功和能动能动能定理练习题 一选择题 1.如图1所示一木块放在光滑水平面上一子弹水平射入木块中射入深度为d平均阻力为f.设木块离原点s远时开始匀速前进下列判断正确的是[ ] A.功fs量度子弹损失的动能 B.f(sd)量度子弹损失的动能 C.fd量度子弹损失的动能 D.fd 量度子弹木块系统总机械能的损失 2.下列关于运动物体所受的合外力合外力做功和动能变化的关系
二功和能动能动能定理练习题 一选择题 1.如图1所示一木块放在光滑水平面上一子弹水平射入木块中射入深度为d平均阻力为f.设木块离原点s远时开始匀速前进下列判断正确的是[ ] A.功fs量度子弹损失的动能 B.f(sd)量度子弹损失的动能 C.fd量度子弹损失的动能 D.fd 量度子弹木块系统总机械能的损失 2.下列关于运动物体所受的合外力合外力做功和动能变化的关系正确的
8 议论文十大功能段落示例现象引入段It ismonly said that one’s first impression of a person is the most important one , and this is certainly true when applied to job interviews This is because the manager often h
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