清中叶、清末时的静宜园全园分为“内垣”、“外垣”和（）。
A.前垣
B.后垣
C.别垣
D.上垣
参考答案：C
If you pay for the computer in cash, you could have a 5% discount; _______ we can deliver it to you for free.
A．in demand
B．in addition
C．in return
D．in place
头罩法给氧时，每分钟氧流量为
A．1～3L
B．2～5L
C．3～6L
D．4～7L
E．5～8L
