如图,⊙O的半径AO为5,弦心距MO为3,则弦AB的长是( )
A:4
B:6
C:8
D:10
站在百米赛跑终点计时员,听到起跑的枪声后立即开始计时,测得李明同学百米赛跑的时间是14.00s,当时气温是15℃,则这位计时员所记录结果是( )
My friends thought they had made things very smooth for me, but I felt there was still much to ________ with.
__________ these notebooks?
1+2=____
7+2=____