早晨,小明沿学校的长方形篮球场跑步锻炼身体,篮球场长28米、宽15米,小明跑了两圈,他跑了多少米?
(28+15)×2×2,
=43×2×2,
=172(米),
答:小明跑了172米.
单项选择(每题1分)
My computer is _____ in need of repair because it doesn’t work at all.
A.well
B.very
C.badly
D.rather
某产品目标成本为800元,该产品分为四个功能区,各功能区的重要度系数和功能现实成本见下表则产品功能改进顺序为()
A.F1-F2-F3-F4
B.F2-F1-F4-F3
C.F2-F3-F4-F1
D.Fl-F4-F3-F2