在休克补液治疗选择输液量和输血量的比例时务必使血细胞比容维持在（） A.25%～30

到2007年，我国水产品出口已连续几年居世界首位，约占世界水产品贸易总额的多少？

阅读理解。

     On a Friday night, a poor young artist stood at the gate of the New York railway station, playing his violin.

The music was so great that many people stopped to put some money into the hat of the young man.

     The next day, the young artist came to the same place, and put his hat on the ground gracefully. Different

from the day before, he took out a large piece of paper and laid it under his hat. Then he began to play the

violin. It sounded more pleasant than ever.

     Soon he was surrounded with people who were attracted by the words on that paper. It said, "Last night,

a gentleman named George Sang put an important thing into my hat by mistake. Please come to claim (认领)

it soon."

     After about half an hour, a middle-aged man rushed through the crowd to the violinist and said, "Yes, it's

you. I knew that you were an honest man and would certainly come here." The young violinist asked calmly,

"Are you Mr George Sang?" The man nodded. The violinist asked, "Did you lose something?""It's a lottery

ticket," said the man.

     The violinist took out a lottery ticket on which George Sang's name was seen. "Is it?" he asked. George

nodded and took the lottery ticket and kissed it, then danced with the violinist. The violinist was a student at

an arts college and had planned to attend advanced studies in Vienna. Later his classmate asked the violinist,

"At that time you needed money to pay the tuition and you had to play the violin in the railway station every

day to make money. Why didn't you keep the lottery ticket for yourself?"

     The violinist said, "Although I don't have much money, I live happily. But if I lose honesty I won't be

happy forever." Through our lives, we can gain a lot and lose so much. But being honest should always be

with us.

1. What did the young artist do at the railway station on Friday? [ ]

A. He played the violin to make some money.

B. He waited for the train to Vienna.

C. He came to buy a train ticket to Vienna.

D. He walked around the New York railway station.

2. Which sentence below best explains the underlined sentence in paragraph two? [ ]

A. Because the violinist loved to play the violin at the station.

B. Because the violinist felt happy when people surrounded him.

C. Because the artist felt happier when he did a good thing.

D. Because he felt happy to attend advanced studies.

3. According to the words on the paper, which sentence below is TRUE? [ ]

A. It asked a gentleman named George Sang to claim his hat.

B. It asked a gentleman named George Sang to claim his important thing.

C. It was a lottery ticket and he needed to find the owner.

D. It was a lottery ticket and the owner is unknown.

4. The artist didn't take the lottery ticket for himself because he ____. [ ]

A. we should share with others if we find something valuable

B. we should know the importance of honesty and lead a happy life

C. keep the lottery if you find one

D. playing the violin could make you feel happy

女，50岁。双手指尖麻木、刺痛逐渐加重2年，多在劳累时加重，有时夜间"麻醒"，甩手或局部搓揉能减轻。绝经1年。体检：血压140/90mmHg，可引出Tinel征和Phalen征，右手桡侧3个半指针刺痛觉略迟钝，未见明显肌萎缩。电生理检查：右正中神经远端感觉潜伏期延长。诊断最可能是（）

A.颈椎间盘突出症

B.腕管综合征

C.末梢神经炎

D.肘管综合征

E.腔隙性脑梗死

瓦斯爆炸的危害有（）

A、产生高温

B、产生强大的冲击波

C、爆炸产生大量有害气体

D、摧毁矿井设施

E、爆炸产生高压

外加剂的品种、掺量应根据工程所用胶凝材料经试验确定。