根据我国反垄断法的规定，反垄断执法机构调查涉嫌垄断行为时享有的职权有 A．询问被调查

若复数（a+i）（1-2i）（ i是虚数单位）是纯虚数，则实数a=______．

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 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." Though our lives, we can gain a lot and lose so much. But being

honest always be with us.

1. What did the young viloin to make some money?______.

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 nmaed 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. chose to be honest

B. didn't need the money.

C. thought the lottery was worth nothing.

D. was afraid of blame if he kept it for himself.

5. From this article, we can learn that ________.

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.

著有论述燥邪为患的专篇——"秋燥论"的医家是（）

A.刘完素

B.俞根初

C.沈目南

D.喻嘉言

中国邮政储蓄银行对由于贵金属委托交易产生的相关费用均由（）承担。

A.客户

B.银行

C.上海金交所

D.第三方中介

设有安全带装置的车辆，应要求车内乘员系安全带。