题目

W:May I help you? M:Yes.I want to visit the Summer Palace and the Tsinghua University.  51  W:Yes,this one does.You visit Tsinghus University in the morning.Right after lunch,the rest of the afternoon is spent in the Summer Palace. 1.     Where is ti? 2.     What is the cost of the tour? 3.     Do you have any tours that include both of them? 4.     On,that’ll be very helpful. 5.     How long does the tour take? 6.     How much do you have? 7.     Where are you staying? M:  52  W:About seven hours.  53  M:At the Hilton Hotel. W:Let’s see.The bus stops 我国钨资源矿产丰富。由黑钨矿提取钨发生的反应之一为：3H2+W03高温W+3H2O。 其基本反应类型是   (     )                                                           A．化合反应B．分解反应C．置换反应 D．复分解反应