下列不是溃疡性结肠炎的手术适应证的是（）。 A.中毒性巨结肠 B.肠穿孔 C.癌变

影响药物蛋白结合的因素有（）

A.药物理化性质

B.与蛋白质的亲和力

C.药物相互作用

D.给药剂量

E.物种、性别以及生理病理状态差异

由于轨道调整的需要，“嫦娥二号”绕月做圆周运动的半径减小，则它的（　　）

A．线速度变小

B．加速度变大

C．周期变大

D．向心力变大

阅读理解。

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项。

Dear editor,

     Several days ago, I heard that a dear friend of mine had killed herself. I was deep in sorrow by the sudden news. I can't keep calm any longer. 1_____.

     Life is so precious. If we can slip into death in an impulsive (冲动的) moment, what use in all our

efforts and hopes? Our families, our ambitions, everything is flung into total darkness. 2_____.

     Nevertheless, the suicide rate increases year by year, particularly of young people. Reasons may vary

from person to person, 3_____.

     First, today's young people are morally weak. They hunger for success but can not face failure; they are eager to be understood but afraid of opening their hearts to others. They live in a wide world, from east to west, ancient to present, but their hearts beat in a narrow desert, closed tight, unable to communicate. Each becomes an isolated fortress (孤堡), lonely, and weak.

     4_____. As a young teacher, she was devoted to her work but was disappointed with her students' occasional failures. She fell in love with a colleague but he deserted her. With no close friends, disappointed at work and in love, death seemed to her the only remaining choice and she took it.

     Another reason for the weakness of today's youth, in my opinion, comes from society's pressures.

5_____. On the other hand, society refuses to accept that children sometimes do fail. But failure is more important because it can teach the young how to win next time.

     What can we do to save the desperate young?

A. I'm always thinking about life and death

B. yet I think they share something in common

C. The young are forced to try too hard to succeed

D. My friend is a good example of that

E. And death allows no time for regret

F. people love success and are afraid of failure

G. failure is the mother of success

纳税人因大修导致连续停用半年以上的房产，其免征的房产税由纳税人在申报缴纳房产税时自行扣除。 ( )

以下有关苷键裂解的说法错误的是（）

A.苷键具有缩醛结构，易为稀酸催化水解

B.苷键原子易接受质子的苷键易酸催化水解

C.苷键原子不易接受质子的苷键易酸催化水解

D.酶催化水解专属性高，条件温和

E.碱催化水解多用于酯苷和酚苷的水解