土地使用权出让金用于（）。A.城市基础设施建设和耕地开发 B.土地开发 C.城市基础

文件的逻辑结构是由下列哪一项决定的( )

A．操作系统

B．磁盘容量

C．用户

D．文件属性

下列纳税人不办理一般纳税人资格认定的有（）。

A.个体工商户以外的其他个人

B.选择按照小规模纳税人纳税的非企业性单位

C.选择按照小规模纳税人纳税的不经常发生应税行为的企业

D.个人独资企业

阅读理解。

     My wife passed away a few years ago, and I went through the worst time in my life. I even wanted to

kill myself. Just for kids, I had to continue to live and work as small-town doctor at my medical clinic in

Hawaii. My kids had gone to live on the mainland, and I was alone. Then they asked me to have a family trip.

      On our trip, we turned on the TV at the motel and saw the second plane crash into the World Trade

Center. Seeing it falling down, I said to my kids:"I'm going to Afghanistan". And a few weeks later,

international Medical Corps sent me to set up 20 clinics in provinces where people had no health care.

     In these field clinics surrounded by frightening shoots or deadly bombs, we were eventually serving

27,000 patients a month in a very busy schedule. Tired and nervous, I gradually had a sense of achievement,

a sense of purpose, and my depression went away. In the years to follow, I went to Indonesia after the

tsunami, Pakistan after the earthquakes, Sudan after the civil warm and Iraq after more and more bombs.

Each time after disasters one after another, hundreds of people were killed, wounded and many more had to

flee. We once set up movable clinics in an area with 19,000 refugees, and it was supposed to hold 13,000

originally. Flu broke out, one of the biggest killers of kids in refugee camps, and it spread like wildfire. Water

and food were also serious problems."Adventures or not?" I often asked myself.

     When my wife passed away, I thought my life was done. But in reality, it was just getting started. At the

end of her life, she went unconscious. I held her head in my hands and told her of all the places we would

visit and the exciting adventures we would have.

      I think about the moment many times during my "adventures". I didn't know how predictive those words

would be. But I know that she is still with me.

1. Where has the doctor been in the past few years?

A. Some countries where he could set up clinics.

B. Some African countries where flu broke out.

C. The places where the earthquakes happened.

D. The places that the horrible disasters struck.

2. How would the doctor describe his life after he had worked in Afghanistan?

A. Tired and troublesome.

B. Busy and risky.

C. Meaningful and helpful

D. Frightening and depressing.

3. The underlined word "refugees" means people ______.

A. who are robbed, killed, or wounded

B. who suffer from flu in movable clinics

C. who like to take adventures

D. who have lost homes because of disasters.

4. Which of the following is TRUE according to the passage? 

A. the doctor's wife encouraged him to work in foreign countries.

B. What the doctor said to his wife before her death became reality.

C. The doctor's adventures made him understand the love of his wife.

D. With the true love of his wife, the doctor started to change his life.

纯净的SF6，气体对人体是没有伤害的。

物种组成是区别不同群落的首要特征。 ( )