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【简答题】
质量是 5 0kg 的人站在升降机中的体重计上,如图,当升降机作下列各种运动时,体重计的读数是多少?( g 取 10m/s 2 ) (1) 升降机匀速上升; (2) 升降机以 2 m/s 2 的加速度加速上升; (3) 升降机以 1 m/s 2 的加速度加速下降; (4) 升降机以重力加速度 g 加速下降. (具体过程写纸上,拍照上传)
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【单选题】You can come ______ on Tuesday _______ on Friday, but whichever you choose, please let me know.
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【单选题】Please choose the right description about the language of two.
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The Language of Two is to divide the world.
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The Language of Two is to list, compile and expand.
C.
The Language of Two is to provide the sense of whole.
D.
The Language of Two is to denote the single-mindedness.
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