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【简答题】
如图 3.5 所示,一根绳子系着一质量为 m 的小球,悬挂在天花板上,小球在水平面内作匀速圆周运动,有人在铅直方向求合力写出 T cos q - mg = 0 (1) 也有人在沿绳子拉力方向求合力写出 T - mg cos q = 0 (2) 显然两式互相矛盾,你认为哪式正确?答 . 理由是 .
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【单选题】If you are selected to contribute to the newspaper, you are advised to check the facts in your articles to the______extent possible.
A.
fuller
B.
fullest
C.
more fuller
D.
more fullest
【单选题】If you observe the point of cloud convergence shifting to the right and the “bar”of the storm appears to move along the horizon ______．
A.
The center of the storm will by-pass you
B.
The storm will strike you on the starboard side
C.
You are in the direct path of the storm and should take immediate steps to batten down loose gear
D.
The storm is starting to break up
【简答题】When you scan for information, it is important that you use the knowledge about the structure of a research article (IMRD structure). Please choose from the following sections of the a research paper ...
【判断题】上固定:在分析人体头颈和躯干骨骼肌工作时,若骨骼肌以其上端(靠近颅侧)附着点为定点,下端(靠近足侧)附着点为动点进行收缩,则该肌的工作条件为上固定。
A.
正确
B.
错误
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