I can swim, I can't swim very well.
A:and
B:but
C:or
D:so
已知作用在物体A上的力分别为F1=3N和F2=4N,并且两力在同一直线上,则F1、F2的合力( )
—Can you tell me _______ it is from home to Yuanbo Garden?—Sure. It's about ten minutes’ drive.
茜茜同学看不清远处的物体,经检查医生说她患了近视,下面是茜茜同学根据所学知识画的近视眼成像情况及矫正方法图,其中正确的是( )