土的级配系数反映了大小不同粒组分布情况。

一个多边形的每一个外角都为36°，则这个多边形是______边形．

对于心房扑动和其他室上性心动过速，推荐初始复律能量值为（）

A.50～100J

B.100～200J

C.200～300J

D.300～360J

E.500J

第三部分 阅读理解（共20小题。每小题2分，满分40分）

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

A

In 1971 a young man who grew up very poor was traveling across the country, trying to make a start for himself. Along the way he had completely run out of money and was forced to spend the night in his car. This continued until one morning, after a week of sleeping in his car, he walked nervously into a restaurant and ordered a big breakfast.

After eating his first good meal in weeks, he found himself lying to the waiter, telling him he had lost his wallet. The waiter, who was also the owner, walked behind the chair where the young man had been sitting. He bent down and came up with a $20 bill that looked as if it had been fallen on the floor and said, “Son, you must have dropped this” the owner said. The young man couldn’t believe his luck! He quickly paid for the breakfast, left a tip, bought gas with the change and headed west.

On the way out of town, he began to understand what the waiter did. Maybe nobody dropped the money at all. “Maybe that fellow just knew I was in trouble and he helped me in a way that didn’t embarrass me. So I just made a promise to help other people if I can.”

Later, he worked very hard and became a rich man. Now, he lives near Kansas City. Each year he gives away thousands of dollars. He is known as the “Secret Santa” because at Christmas time each year, he personally hands money out to those on the street and at restaurants. Last year, he gave more than $50,000 away in Kansas City.

56. The young man was traveling across the country in 1971 to ______.

A. find a piece of work to do

B. hand out gifts to passers-by

C. look for a good restaurant

D. show his new car to others

57. The underlined word “this” in paragraph 2 means ______.

A. a wallet    B. his luck    C. the $20 bill    D. his tip

58. On the way out of town, the young man got to know that ______.

A. it was very honest of the owner to return his money

B. another man who had breakfast in the restaurant lost the money

C. he could find a job in the restaurant

D. the owner helped him in a way that didn’t hurt his feelings.

59. From this text we can see that ______.

A. the man dropped $20 on the floor of the restaurant

B. the man did carry out his promise

C. Santa gives the man money each year

D. the man was not successful in the end

60. The best title for this passage may be ______.

A. Secret Santa of Kansas City

B. The Key to Success

C. A Kind Waiter in the Restaurant

D. Never Give Up

五四文学革命发起与开展情况：

有关急性特发性血小板减少性紫癜的治疗，哪一项是错误的

A．泼尼松口服
B．静滴免疫球蛋白
C．立即输血小板
D．积极预防和控制感染
E．避免用阿司匹林