患者，男性，50岁，骤发剧烈上腹痛，伴腹胀、恶心、呕吐1天。患者于发病当天无明显诱因

阅读理解。

     Once, there was a man whose name was Tom. He loved his wife very much. A special day was

coming. It was his wife's birthday. Tom decided to buy something for her.

     The next day he went home and said to his wife, "I bought something for you." "Thank you!" said his

wife happily. "What have you bought for me?" "I've bought a gold ring. Here it is." He took it out for his

wife to see. Carelessly, he dropped it onto the ground. He began to look for it on the ground, but it was

dark in the house and he could not see anything. Then he went out and began to look for it in the street.

     He looked and looked. After a while, a friend came along. "What's the matter with you?" asked his friend.

"I am looking for my ring. It was for my wife. But I lost it just now." said the poor man."Where did you

lose it?""I lost it in my house.""You lost your ring in your house, but you are looking for it in the street. How

foolish you are!" "Ah," said the man,"But it is dark in my house. I will never find it there. Anyhow, here in

the street, it is much brighter, I can see everything more clearly."

     My dear friend, do you think Tom could find his gold ring in the street?

1. Whom did Tom buy a ring for?

A. His son.

B. His mother.

C. His wife.

2. Where did Tom lose his ring?

A. In the street.

B. In his house.

C. At his friend's house.

3. The man looked for the ring in the street because _______.

A. he lost it in the street

B. it was much brighter

C. his friend came up

4. The friend thought the man was _______.

A. foolish

B. clever

C. good

某商人经营甲、乙两种商品，每件甲种商品的利润率为40%，每件乙种商品的利润率为60%，当售出的乙种商品的件数比甲种商品的件数多50%时，这个商人得到的总利润率是50%；当售出的乙种商品的件数比甲种商品的件数少50%时，这个商人得到的总利润率为______．

（利润率=利润÷成本）

患儿，7岁。上前牙自发痛，冷热刺激加重。深龋，探痛，叩（+），未见穿髓孔，温度测敏感，不松动，

牙龈未见异常临床拟诊断为（）。

A.深龋

B.牙髓炎

C.牙髓坏死

D.牙髓变性

E.急性根尖周炎

实验动画影片被称为（），其特色是个人化和实验性。

A、艺术动画片

B、平面动画片

C、实物动画片

D、真人动画