羊水栓塞发生率高的情况是A．足月正常分娩B．中期引产钳刮术中C．剖宫产中D．水囊引产

Tom lived a long way from the city. One day he went to the city to buy something in the shop, and after he bought them, he went into a restaurant（餐厅） and sat down at a table. When he looked round, he saw some old people put eye glasses（眼镜）on before reading their books, so after lunch he went to a shop to buy some glasses, too. He walked along the road, and soon found a shop. The man in the shop made him try on(试戴) a lot of glasses, but Tom always said, “No, I can’t read with these.”

The man became more and more puzzled(困惑). At last he said, “Excuse me, but can you read at all?”

“No, I can’t,” Tom said, “If I can read, do you think I come here to buy glasses?”

1. Tom met some old people____________.       .

A. far away from the city                      B. in the shop

C. in the restaurant                           D. in the park

2. When did Tom go to the shop to buy some glasses? ____________.

A. After lunch     B. Before lunch    C. In the morning   D. In the evening

3. Tom went to a restaurant to____________.        .

A. buy eye glasses  B. have lunch  C. buy some books D. sell eye glasses

4. Before reading their books the old people in the restaurant____________.    .

A. drank tea           B. took their glasses off

C. bought glasses       D. put their glasses on

5. In fact, Tom ____________.

A. liked eye glasses                   B. liked reading

C. couldn’t read at all               D. knew the man in the shop

地震中发生后，许多爱心人士向灾区捐款捐物。他们这是在行使对自己财产的[ ]

A．占有权

B．处分权

C．收益权

D．使用权

（14分）A、B、C、D四种可溶的化合物(所含离子各不相同)，分别由阳离子Na^＋、Mg^2＋、Al^3＋、Ba^2＋和阴离子两两组合而成．为了确定这四种化合物的成分，某同学进行了如下实验操作：

①将四种化合物各取适量配成溶液，分别装入四支试管．

②取A溶液分别滴入另外三种溶液中，记录实验现象如下：

③向B溶液中滴入D溶液，无明显实验现象．请回答下列问题：

(1)写出它们的化学式：A________；B________；C________；D________.

(2)上述②的第三次实验，再加入A，沉淀部分溶解的离子方程式为__________________．

(3)③中若是向C溶液中滴入D溶液，可能出现的实验现象是                       ，

反应离子方程式为                                  ．