题型:选择题 When products made in factories _____, they are thrown away as garbage.A.come to an endB.are put to useC.are used upD.wear out 查看答案
题型:单项选择题 用下面哪个可以归纳网络202.16.0.0/24、202.16.1.0/24、202.16.2.0/24和202.16.3.0/24?()A.202.16.0.0/24B.202.16.4.0/23C.202.16.0.0/23D.202.16.0.0/22 查看答案