题目

1．The rescue workers final arrived at the end of last week. 2．Million of Chinese people are learning English as a foreign language. 3．I want to offer my sincere congratulation to you on your exam results. 4．Workers built shelters for survivors which homes had been destroyed. 5．As matter of fact, those books are of high quality. 6．We are amazing to find that no one got injured in the accident. 7．All of them want to get a closely look at the picture. 8．Bill was standing by the car, talking to two men which were helping him to repair    it. 9．Thousands of people go to th在下列反应中，X、Y、Z各代表一种物质，其中X是碱，三种物质的转化关系如下：2X+H2SO4=Y+2H2O，Y+BaCl2=Z↓+2NaCl．则X、Y的化学式依次为（ ）A．NaOH    Na2SO4B．Na2SO4NaOHC．KOH      K2SO4D．Na2SO4BaSO4