原子吸收光谱法的定量基础是（）。

Mrs. Brown lived in a small town near a big farm. One Friday afternoon after she finished          housework, she went to her small shop. She opened the window of the shop and       outside. She liked to see the green farm. There were many cows, horses and small animals           the farm. Suddenly she saw a kangaroo(袋鼠) under her window. It was interesting to see that it was           an old jacket. It stood there and looked hungry. Mrs. Brown gave some bread           water to it. The kangaroo ate them          . Then it became happy and jumped away. Suddenly something dropped on the          from its jacket pocket. It was a wallet! She picked it up, opened and found there was $300 and a photo in it. That was a man's photo with his name "John" on it. John? She looked more           and remembered she had a brother many years ago. His name was also John. "Is this man my lost brother?" she thought. She took the wallet with her and began to         the man. She asked many people in the town, and then she came to the farm and asked the farmer. To her great surprise, it was John, her lost brother. They were very excited and          to see each other.

小题1:	A．his B．our C．their D．her

小题2:	A．looked B．saw C．look D．see

小题3:	A．for B．out C．on D．from

小题4:	A．wears B．wearing C．wear D．has

小题5:	A．or B．and C．but D．nor

小题6:	A．all B．none C．any D．many

小题7:	A．back B．water C．river D．floor

小题8:	A．careful B．carefully C．care D．careless

小题9:	A．find B．call C．look for D．look after

小题10:

A．sad B．angry C．late D．happy