旅游投诉由旅游合同签订地或者被投诉人（）管辖。 A.所在地县级以上地方旅游投诉处理机

下列各项中，符合资产会计要素定义的是( )。

A．计划购买的原材料
B．待处理财产损失
C．委托加工物资
D．预收款项

Last Monday, I bought a second-hand computer, ______ was very slow.

A．which price

B．its price

C．the price of whose

D．the price of which

They ______ Miss Smith, their English teacher, with a bunch of flowers.[ ]

A. gave

B. sent

C. bought

D. presented

什么是历史数量研究方法？它存在的客观基础什么什么？有何史学意义？