社会分工
参考答案:
是不同部门之间和各部门内部的劳动分工。
l like this house with a beautiful garden in front,but I don't have enough money to buy _____. [ ]
A. one
B. it
C. this
D. that
弧光中的红外线可造成对人眼睛的伤害,引起()。
A.畏光
B.眼睛流泪
C.白内障
D.电光性眼炎