我国最长的南北铁路大动脉是（ ）
A．京广线
B．京九线
C．京沪线
D．焦柳线
答案：B
Always keep a first-aid kit in your home-just _____ there is an accident. [ ]
A. in case
B. so that
C. as though
D. even if
糙米的营养价值优于精米。（）
