【判断题】有地位有身份的男士比较重要的场合出来的话,腰带上一定要少挂东西。
【简答题】计算图所示系统中物体的加速度.设滑轮为质量均匀分布的圆柱体,其质量为 ,半径为 ,在绳与轮缘的摩擦力作用下旋转,滑轮轴给予的摩擦阻力矩为 ,忽略桌面与物体间的摩擦,设 =40kg, =200 kg,M=20 kg, =0.1 m,
【简答题】Figure 1 is a section through a jet engine. The forward compression section operates at low to medium temperatures, and titanium parts are often used. The rear combustion section operates at high temp...
【简答题】计算如图所示系统中物体的加速度.设滑轮为质量均匀分布的圆柱体, 转动惯量为 J,其质量为M ,半径为r ,在绳与轮缘的摩擦力作用下旋转,忽略桌面与物体间的摩擦。分别对物体 、 建立牛顿第二定律方程,对滑轮建立刚体定轴转动定律方程。请完成下列连线。
【单选题】The counter shown in Figure 1 is a(n) ________ counter, and the correct output waveform for Q1 is ________.
【单选题】图所示系统中物体的加速度.设滑轮为质量均匀分布的圆柱体,其质量为M,半径为r,在绳与轮缘的摩擦力作用下旋转,忽略桌面与物体间的摩擦,设m1=50kg,m2=200 kg,M=300 kg, r=1 m ,g=10m/s/s, 请把本题解题过程发讨论区
【简答题】Figure 1 is a (1) _______________ chart, which shows the different forms of (2)_____________ used by students in the (3)____________School. The most popular form of transport for male students is the ...
【简答题】将按图所示的规律排列,若用有序数对(n,m)表示第m行从左到右第m个数,如(4,3)表示整数9,则(11,3)表示的整数是__________。
【简答题】Figure 2 is a stress-strain diagram. 1) Label A) tensile strength, B) yield strength, C) plastic region, D) elastic region, E) Modulus of elasticity; 2) Is this stress-strain diagram for a ductile mat...