已知A、B、C三点在同一直线上,AB=16cm,BC=10cm,M、N分别是AB、BC的中点,则MN等于( )。
13cm或3cm
架空管道防腐涂层应均匀,颜色应()。
A、不同
B、醒目
C、鲜艳
D、一致
A.Because she could not sleep well at night.
B.Because she hoped to earn more money.
C.Because she could not find a daytime job.
D.Because she needed a change and a lighter job.