在基础的信息网络方面,骨干网络70%到80的网络设备都来自进口。
参考答案:对
一What dose your mother do?
一__________
A.She is thirty .
B.She is a teacher .
C.She is fine .
D.She is tall.
冷伤包括:()
A.冻疮
B.战壕足
C.水浸足
D.冻伤
E.冻僵