安全帽耐冲击试验最大冲击力不应超过多少?()
A.400kg
B.500kg
C.600kg
D.700kg
参考答案:B
Miss Hyde _____ 20 dollars buying a new handbag last week. [ ]
A. paid
B. spent
C. cost
D. took
宽带连接提示错误代码“769”可能是网卡损坏或网卡驱动失效造成,或者未安装网卡。