如何产生带有正方形的项目的列表()
A.list-type:square
B.list-style-type:square
C.type:square
D.type:2
参考答案:B
— Do you think it's a good idea to make friends with your students?
— _____, I do. I think it's a great idea. [ ]
A. Really
B. Obviously
C. Actually
D. Generally
一个运动员用力F把一个质量为m的铅球向斜上方推出,若不计空气阻力,推出后铅球向斜上方飞行过程中受到的力只有_________,其大小为_______,方向_________。