合同变更属于对原有合同的实质性变更时，应以( )的方式变更。A．专业条款 B．补充

完形填空（共20小题；每小题1分，满分20分）

阅读下面短文，从短文后所给的四个选项A、B、C、D中,选出可以填人空白处的最佳答案，并在答题卡上将该项涂黑。

There are reasons why a middle-aged woman who has been away from the work for her children’s sake decides to go back to work. The  16 reason for me was: years ago my job was that of a bookkeeper(会计)----- it was then that I worked for  17  , and now with my children working, I wanted to do something  18  , something new and exciting.

Money wasn’t too important now, as my husband made a very  19  living for us. But what should I do? What sort of   20  should I look for? I knew I needed to be  21  as to what I became involved with. I am not a "quitter"(容易放弃的人) and so I hoped to  22  becoming responsible to an employer in a job that might turn out to be a mistake for me.

While I made painful efforts thinking over what to do, I was  23  of a past incident where I needed to replace my original engagement ring  24  the gold was wearing thin. My husband and I shopped and shopped for one,  25 we went, even when we were on vacation.  26  this nonstop searching got my poor  27  to ask, "Just what kind of ring do you want, what exactly are we looking for?" My reply was, "I honestly don’t  28, but when I see the correct setting, I will know it." That was the  29  I felt about the new career I wished to start; I didn’t have an exact idea as to what I wanted to do, but knew there was a perfect fit for me, if I would  30  be patient.

Fortunately, that summer while I  31  my twenty-fifth high school class reunion(重聚), I heard a former classmate  32  what she did for a living. She was a travel agent, and she and her husband had just  33 from a trip to Hawaii where they acted as guides for a group of travelers. WOW, that  34  like fun, considerably more fun and exciting than being a  35  : I know what to take up!

16. A. possible                  B. obvious             C. believable              D. good

17. A. money                B. fun                   C. children                   D. employers

18. A. valuable              B. reasonable         C. worthy                     D. different

19. A. interesting           B. comfortable              C. successful             D. meaningful

20. A. pleasure                     B. place                 C. job                     D. man

21. A. careful                B. useful           C. joyful                 D. painful

22. A. finish                 B. miss                  C. avoid                       D. forget

23. A. recalled                     B. reminded           C. warned                    D. robbed

24. A. where                 B. while                C. if                D. as

25. A. nowhere             B. somewhere        C. wherever                  D. everywhere

26. A. Actually              B. However           C. Finally                     D. Once

27. A. children                     B. classmates         C. employer                  D. husband

28. A. care                    B. know                C. understand            D. find

29. A. way                    B. time                  C. style                        D. thought

30. A. really                 B. ever                  C. just                          D. certainly

31. A. joined                 B. left                   C. started                  D. attended

32. A. complaining        B. explaining         C. describing            D. considering

33. A. returned                     B. rested                C. came                        D. stayed

34. A. looked                B. seemed              C. sounded                   D. felt

35. A. travler                B. wife                  C. employer                  D. bookkeeper

疑有食管异物，在X线检查时，下列说法错误的是（）。

A.食管异物最易停留在食管的生理狭窄处

B.透视可清晰显示如金属或骨类的不透X线异物影

C.透X线的异物需要用钡棉检查，无挂棉现象即可排除异物

D.食管异物可引起食管周围脓肿

E.食管异物可引起大血管破裂导致大出血

一饱胃后脑外伤清醒病人拟行急诊手术。

病人呕吐后出现呼吸困难，最可能的原因是（）

A.误吸

B.肺栓塞

C.支气管痉挛

D.肌松药的残余作用

E.全麻药的中枢性呼吸抑制

王某，男，72岁。有健忘病史多年。如今计算力、定向力明显减退，神情呆钝，词不达意，头晕耳鸣，腰酸骨软，舌瘦色淡，苔薄白，脉沉细弱。其治疗首选的方剂是（）

A.还少丹

B.补阳还五汤

C.人参养荣汤

D.七福饮

E.转呆汤

阀门型号的第一个单元是用汉语拼音字母表示阀门型号的。