对香港地区的铁路运输中,深圳外运和香港中旅社向发货人核算运输费用的凭证是()
A、国内铁路运单
B、起运电报
C、承运货物收据
D、供港货物委托书
参考答案:D
(2012·福建卷)—What are you going to do this weekend?
—________.If time permits,I may go to Shanghai with my friends.
A.Don’t mention it
B.It doesn’t matter
C.Forget it
D.It depends
试述类风湿病的治疗原则。