【判断题】In both China and Western countries, it is very common and usual for adults to hold other people’s babies and very small children to show their affection and friendliness.
【简答题】下面是画挂在弹簧下小球在震动过程中小球位移y随时间t变化的函数y=f(t)的曲线的程序. 补充完整下列程序,并运行,上传图像. n=2000;k=2;d=0.01;y=2;v0=0;a0=-2k;ylist={{0,y}}; Do[v1=v0-____d;y1=_______;AppendTo[ylist,{i d,___}];v0=v1;_______,{i,1,n}]; ListPlot[yl...
【判断题】In both China and Western countries, it is very common and usual for adults to fondle other people’s babies and very small children to show their affection and friendliness.
【单选题】应变是指
B.
物体在内部应力作用下发生的形状和大小的相对变化
D.
在应力作用下形变的物体解除外力后完全恢复原状
【简答题】塑化能力又称塑化容量,是指( );单位是( )。
【判断题】T he usual dose of penicillin G by intramuscular administration is 400,00 0 ~ 800,000 units, 2 ~ 4 times a day for children.