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【单选题】
用氦气球悬挂起广告标志是利用了40个发明原理中的A.
配重
B.
嵌套
C.
预处理
D.
局部质量
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举一反三
【单选题】听力原文：Why does the man get ill? (21)
A.
He has never been immunized.
B.
He doesn't rest enough due to hard work.
C.
He doesn't like to take medicine.
D.
He is exposed to the virus-filled environment.
【简答题】质量为1kg的物体，在外力作用下由静止开始运动了3m，外力作功为18J，则物体的末速率为 m/s。
【简答题】According to interpersonal theory of depression, people might be mentally ill without enough______.
【单选题】It remains ________ whether Jim’ll be fit enou
A.
18. It remains ________ whether Jim’ll be fit enoughto play in the finals. （浙江） A.seen
B.
to beseen
C.
seeing
D.
tosee
【单选题】When she was over fifty, the late nineteenth century mother ______.
A.
would be healthy enough to take up paid employment
B.
was usually expected to die fairly soon
C.
would expect to work until she died
D.
was unlikely to find a job even if she wanted one
【简答题】如图所示,质量为m=1kg的物体,放在倾角θ=37°的足够长固定斜面底端上,现对物体施加一个大小为F=16N、方向平行斜面向上的外力,使物体由静止开始在力F的作用下,从斜面底端向上运动t 1 =1s后撤去外力F。已知物体与斜面间的动摩擦因数μ=0.25,不计空气阻力,物体可视为质点,sin37°=0.6,cos37°=0.8,取g=10m/s 2 。求: (1) 物体由静止开始在力F的作用下开始向...
【单选题】在几千年历史长河中,中国人民始终团结一心、同舟共济,建立了统一的多民族国家,发展了56个民族多元一体、交织交融的融洽民族关系,这体现了( )
A.
伟大创造精神
B.
伟大奋斗精神
C.
伟大团结精神
D.
伟大梦想精神
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