使用卡瓦卡持钻铤时，卡瓦距内螺纹端面为（）。A.5cm B.50cm C.30cm

第二节：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31~50各题所给的四个选项（A、B、C和D）中，选出最佳选项。

For long, a question disturbed a little boy. He couldn’t understand why his next-desk-pal(同桌)could rank lst whenever he wanted to , while he himself 31 to .

At home, he asked his Mom, “Mom, am I more 32 than others? I feel I study as hard as him, but why do I 33 lag behind?” Staring at him ,she went 34 ,not knowing how to explain.

She felt an impulse (冲动)to say , “you are too 35 .You are not really as hard-working as others…”but she stopped 36 she knew her son was suffering from the pains of 37 grades and rankings . She thought it 38 to add any additional burden to his son and was trying to find out a(n) 39 answer.

Time went by quickly, the son finished primary school. 40 studying harder and harder, he was still unable to 41 his pal. To show her pride of him, Mom decided to take him to the sea. During the trip, she 42 to give out an answer.

Now, the son no longer 43 his rankings, because, with the lst ranking, he was 44 by Harvard University .

Back home in winter vacation, he was invited to 45 the students and parents in high school. In the speech, he mentioned a(n) 46 experience in his childhood:…When my mother and I were lying on the beach, she pointed to the front and said ,“Do you see the seabirds fiying for food over there? When the 47 comes near,  little birds can escape quickly 48 ‘clumsy’ seagulls (笨拙的海鸥)would take more time to complete the 49. However, have you noticed birds that 50 fly across the endless ocean are none other than ‘clumsy’seagulls?”

31.A.refused                        B.decided                    C.failed                        D.afforded

32.A.troublesome                B.stupid                       C.naughty                     D.careless

33.A.always                         B.never                        C.hardly                       D.even

34.A.wrong                         B.worried                     C.crazy                        D.wordless

35.A.young                         B.lazy                  C.clever               D.old

36.A.although             B.before                     C.beacuse              D.unless

37.A.worrying                       B.surprising            C.doubting                   D.unsatisfying

38.A.cruel                B.unnecessary          C.important             D.impossible

39.A.natural            B.harmonious           C.perfect             D.ordinary

40.A.Besides              B.Despite             C.Beyond               D.Without

41.A.get through         B.come across          C.compare with         D.keepup with

42.A.managed            B.hesitated            C.determined        D.remembered

43.A.cares about         B.doubts about         C.wonders about      D.worries about

44.A.invited                        B.accepted                    C.welcomed                  D.dismissed

45.A.visit                              B.contact                  C.address                  D.meet

46.A.private                        B.valuable                    C.interesting                 D.unexpected

47.A.wave                           B.food                         C.wind                         D.time

48.A.and                        B.since                         C.until                         D.while

49.A.game                           B.fun                           C.match                       D.process

50.A.suddenly                 B.immediately                 C.finally                       D.gradually

男，65岁，慢性咳嗽、咳痰5年，每年冬季发作，持续3个月余，近2周再次出现咳嗽、咳痰，为白黏痰，无发热及呼吸困难。血、尿常规及心电图均正常。胸片示：双肺纹理增多、紊乱。最可能的诊断是（）。

A.慢性支气管炎

B.支气管扩张

C.支气管哮喘

D.肺结核

E.肺脓肿

熔渣

病理学分类的器质性改变的不良反应包括

A．炎症型、增生型、发育不全型、萎缩或坏死型、血管及血管栓塞型、“三致”

B．炎症型、增生型、发育不全型

C．炎症型、增生型、发育不全型、萎缩型

D．炎症型、增生型、发育不全型、萎缩或坏死型、血管及血管栓塞型

E．炎症型、增生型、发育不全，“三致”

经过资格预审后，招标单位应当向（）的投标单位发出资格预审合格通知书，告知获取招标文件。

A、参加资格预审

B、资格预审合格

C、资格预审不合格

D、以上选项都不对