滚动轴承按轴承承受的载荷方向和大小，分为（）、（）
参考答案：向心类轴承；推力类轴承
帮助他人要 [ ]
①真诚
②借助别人和社会的力量
③两肋插刀、上刀山、下火海，将生死置之度外
④把帮助当成一种施舍
A、①②
B、①③④
C、②③④
D、①②③④
— Bonnie, you can't take photos in the museum.
— Come on, Mum, you needn't remind me. And we can't touch the exhibitions, ______. [ ]
A. as well
B. too
C. either
