【判断题】● The author of Essay Model 1 argues that youth “ is a state of mind ” and “ this often exists in the young people full of vigour and vitality. ”
【简答题】如图所示的处于铅直面内的系统,质量为 m,长为 4r 的均质杆 AB 与半径为 r 质量为 m 的均质圆盘 O 通过铰链 C 连 接,C 为杆 AB 的中点。圆盘 O 放置在光滑水平面上,圆盘一直 与水平地面保持接触,其上作用一未知力偶矩 M。滑道 B 和 A 分别为铅垂与水平方 向,不考虑滑道摩擦和滑块 A、B 的质量。图示瞬时 AB 与铅垂方向的夹角为 30°, OB 连线位于铅垂方向,已知该...
【简答题】This essay argues against the current tendency that college students move away from to __________________ such as accounting to help them easily ______________.
【单选题】如图所示,一个半径和质量不计的定滑轮 O 固定在天花板上,物块 B 和 A 通过轻弹簧栓接在一起,竖直放置在水平地面上保持静止后,再用不可伸长的轻绳绕过滑轮连接物块 A 和 C ,物块 C 穿在竖直固定的细杆上, OA 竖直, OC 间距 l =3m 且水平,此时 A 、 C 间轻绳刚好拉直而无作用力。已知物块 A 、 B 、 C 质量均力 2 kg 。不计一切阻力和摩擦, g 取 10m/ s ...
C.
绳子对物块 C 做功的大小等于物块 A 动能的增加量
【判断题】The author, through writing the essay, argues for his rightfulness of doing animal research.
【简答题】The text is an _________________________ , the purpose of which is to convince readers by using good ___________ and strong ____________ . The author, through writing this essay, argues for his rightf...