以下是生活中涉及到的物理常识，判断错误的是 A．普通人步行时速度约为1.4m/s

心脏听诊内容不包括（）。

A.心率

B.心律

C.心音和额外心音

D.心界

E.心包摩擦音

完形填空（共20小题；每小题1.5分，满分30分）阅读下面短文，掌握其大意，然后从1—20题各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。

Throughout history man has had to accept the fact that all living things must die. But people now live longer than they   1 . Yet, all living things still show the   2  of aging, which will eventually   3  death.

Aging is not a disease, but as a person passes maturity (成熟期), the cells of the body and the  4 they form do not function as well as they  5  in childhood and teenage years. The body provides less  6  against disease and is more  7  to have accident.

A number of related causes may   8  aging. Some cells of the body have a fairly long life, but they are not   9 when they die. As a person ages,   10  of brain cells and muscle cells decreases.   11  body cells die and are replaced by new cells. In an aging person the  12  cells may not be as workable or as capable  13  growth as those of a young person.

Another  14  in aging may be changes within the cells  15 . Some of the protein chemicals in cells are known   16  with age and become less elastic (有弹性的). This is why the skin of old people wrinkles (皱纹) and   17 . This is also the reason why old people   18  in height. There may be other more important chemical changes in the cells. Some complex cell chemicals, such as DNA and RNA, store and   19  information that the cells need． Aging may affect this  20 and change the information-carrying molecules so that they do not transmit the information as well.

1. A．would                    B．be used to            C．used to               D． used

2. A．function             B．effect                                         C．affect            D． sign

3.    A．lead in            B．give in                 C．run into              D． result in

4.    A．hands            B．feet                    C．heart                D． organs

5.    A．do               B．has done           C．did                  D． had done

6.    A．energy           B．protection         C．vigor             D． power

7.    A．likely             B．probable           C．possible              D． alike

8.    A．attend to          B．contribute to      C．add to              D． devote to

9.    A．replaced          B．reborn              C．recovered        D． surrendered

10. A．a number         B．the amount       C．the number       D． a great deal

11. A．The others       B．The other        C．Another           D． Other

12. A．old               B．left                C．new              D． other

13. A．to                 B．for                C．of                D． in

14. A．factor             B．effect              C．reason             D． element

15. A．for themselves    B．of themselves   C．themselves      D． on their own

16.   A．change             B．to have changed  C．to change        D． to be changed

17. A．hangs loose      B．hangs loosely       C．is hanging loosely D． is hanging loose

18. A．increase           B．shrink              C．lengthen           D． decrease

19. A．pass away        B．pass by             C．pass off           D． pass on

20. A．improvement     B．procession        C．approach         D． process

如图是一个简易压水泵，整个手柄是一个弯曲的杠杆。图中箭头表示此时活塞的运动方向。请在图上标出支点O，画出作用在手柄上的最小动力F₁，并作出的力臂L₁。

男，36岁，5年前发现HBsAg（+），近2年数次出现ALT增高，经治疗可恢复，近2月来乏力纳差。体检巩膜不黄，亦未见肝掌、蜘蛛痣，肝肋下1cm，脾侧位可及。ALT420IU／L，Tbil20mmol／L，HBsAｇ（+）。

本病人的预后不会有下列哪种情况（）

A.肝脏表面凹凸不平

B.肝性脑病

C.发展成慢性重型肝炎

D.门静脉宽度逐渐增宽

E.肝脏逐渐增大、增厚

电杆的埋深要求关系重大，根据运行经验一般埋深为电杆长度的( )，最小不得小于1.5m，杆根埋设必须夯实。

A．1/3

B．1/4

C．1/6

D．1/10