题干

向一定质量AgNO3和Cu(NO3)2的混合溶液中加入Zn,溶液质量与加入Zn的质量关系如图所示,下列说法正确的是(   )

A:a点溶液中的溶质有2种

B:c点溶液中溶质为Zn(NO3)2

C:若取b~c段溶液,滴加稀盐酸,有白色沉淀

D:取d点的固体,加入稀盐酸,有气泡产生

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B,D

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    What's going on under Liverpool?
A Rainy Day in Liverpool

    Dark clouds appear over the River Mersey and a cold wind is blowing. A few rain drops are beginning to fall. We're in the famous city of Liverpool and we're going to spend this rainy day in the Williamson Tunnels.
  An Interesting Life Story

    Joseph Williamson was born into a poor family in 1769,but left home and went to work for a tobacco company aged 11. He began at the bottom, and finally became head of the business.

 An Unsolved Mystery

    Nobody knows why Williamson dug tunnels under most of Liverpool, but many think it was to create jobs. Perhaps half of Liverpool's population worked for him. The industry of war had made enormous amounts of money, but now Liverpool was in a terrible financial situation.

 The King of Edge Hill

    I went on a guided tour starting close to where his empire began in Edge Hill. In the tunnels, the steps leading from rooms below ground to those buildings, which no longer exist, seem particularly ghostly.

Incredible Engineering

    We go into the Double Tunnel. It's just been discovered that it's actually a triple tunnel - but nobody knows why the three tunnels were built on top of each other.

    We finish the tour and decide we'll have a coffee in the Williamson Tunnels Cafe Bar. There, I notice lots of flyers for bands and theater groups that are coming to play there.

Why Liverpool?

    Apart from the obvious attractions like the football clubs, or anything to do with the Beatles, Liverpool has a lot to offer. Princes Park and Croxteth Park were royal hunting grounds and the trees are 200 years old. Renshaw Street displays are an unusual mix of architecture styles. The nightlife is exciting. If you want to experience a part of the British Isles with a character entirely different from London, you should definitely come to Liverpool.