已知⊙O的直径等于12cm,圆心O到直线l的距离为5cm,则直线l与⊙O的交点个数为()
A:0
B:1
C:2
D:无法确定
8.3×3-8.3=____
,
人体吸入的氧气最终去向是( )
A. Nice to meet you, too
B. My name is Sarah.
C. Thank you.
D. Hi, I'm Amy.