肛瘘发生的常见原因是_________。

A man was driving at 70 miles in a 40-mile-zone, when a police car came behind him with the flashers(警灯) on. As he pulled over and stopped, he could see a policeman getting out of his car. Right away the man started thinking of excuses to give, as this was not the first time, he had been in similar situations many times before.

As the policeman came to him, he said, “Hi, officer, I guess you caught me a little bit over the limit. I was in a rush to get home, to be with my wife and kids, you know my younger son wasn’t feeling too well, when I left home this morning.”

The policeman said, “Well, I guess so,” and started scribbling(速写) in his notebook. As minutes went by, he could see from the side view mirror, the policeman was still scribbling. The man was wondering why he hadn’t asked for his driver’s license so far.  A few moments later, the policeman came to his window and handed him a folded paper, and returned back to his car without saying a single word. The man started to wonder, how much this ticket is going to be as he began to unfold the paper. He was surprised it was not a ticket as he began to read:

“I had a daughter who was killed by a speeding car at the age of six, by a speeding driver like you. He got a fine (惩罚), a few months in prison, and was free, free to hug his two other daughters. I only had one, and now I have to wait until I get to heaven before I can hug her again. I have tried to forgive that man a thousand times, and I thought I had. Maybe I really did forgive him, but I have to do it again, even right now. So pray(为……祈祷) for me, and be careful when you drive again, my son is all I have left.”

The man was completely dumbfounded(目瞪口呆的) and could not move for the next few minutes. When finally he did, he drove slowly, even a few miles under the speed limit, praying for forgiveness.

52. Why did the policeman stop the man?

A. Because the man drove after drinking.

B. Because the man drove at a speed of 40 miles an hour.

C. Because the man drove over the speed limit

D. Because the man drove in a 40-mile-zone.

53. Which statement is TRUE according to the article?

A. It was the first time that the man had driven over the limit a little bit.

B. He was in a rush to get home because his son was not feeling well.

C. This story happened in the morning.

D. The policeman didn’t believe the excuse the man gave.

54. From what the policeman said in Paragraph 4 we know that ______.

A. he wanted to go to heaven to hug his daughter

B. he recognized the man who had driven the speeding car who killed his daughter

C. the man who had killed the policeman’s daughter was free to do anything in prison

D. the man who had killed the policeman’s daughter hugged his own daughters in prison

55. Why did the man at last drive slowly?

A. Because he was afraid to be fined again.

B. Because he heard his son was feeling well.

C. Because he was driving in a 40-mile-zone.

D. Because he got a good lesson from what the policeman had written.

某男，36岁，工程师。慢性周期性上腹痛2年，头晕及活动后心悸气促1周。血常规：红细胞3.2×10¹²/L，血红蛋白72g/L，白细胞6.0×10⁹/L，血小板140×10⁹/L。大便隐血试验(++)。

导致病人出现贫血的原因可能是

A．饮食不规律

B．消化性溃疡出血

C．再障

D．钩虫病

E．白血病

24h尿量少于多少毫升时，称少尿（）

A.400

B.300

C.200

D.100

E.50

只有同时兼顾公平与效率两个方面的税制才是最好的税制，这是无须证明的。但就具体的税种来说，往往不是低效率、高公平，就是高效率、低公平，高效率、高公平的最优结合是少有的。就某一具体的税种来说，往往是不以效率为主导：就是以公平为核心，二者并重并不一定是理想状态。
这段话主要支持了这样一种观点，即就某一具体税种来说，( )。

A．是公平与效率之间的妥协
B．兼顾高效率和高公平不是最好的
C．兼顾高效率和高公平才是最理想的
D．不应以效率为主导，而应以公平为核心