火炬置换采用的置换介质是（）。 A.氮气 B.空气 C.蒸汽 D.工艺原料气

阅读下面短文，掌握其大意，然后从36~45各题所给的A、B、C和D项中，选出最佳选项，并在正确选项上化对钩.

       There once was a farmer who lost his watch in his barn (谷仓). The watch was only cheap but was very ____36    to him because it was a gift from his father.

       After _  37 __ the barn for a long time, he gave up and asked for __38 __ from a group of children playing nearby.

       He __39 __ them that the person who found the watch would be rewarded.

Hearing this, the children hurried inside the barn ___40 __. They searched everywhere but still could not find the __41 ___. Just when the farmer was going to give up, a little boy went up to him and asked to be given another ___42___.

       The farmer looked  I'm daydaytest Placeholder!boked at him and thought, “ Why not? After all, this kid looks honest.”

        So the farmer __43 _ the little boy back into the barn. After a while the little boy came out with the watch in his hand! The surprised farmer asked the boy how he ___44__ where the rest had failed.

        The boy replied, “ I did nothing but sit quietly and listen for the sound of the watch.”

        This shows us that sometimes a __45__ mind can think better than an excited one.”

36. A. important            B. expensive          C. useless              D. interesting

37. A. finding                B. searching           C. watching           D. studying

38. A. money                B. danger               C. work                D. help

39. A. promised            B. taught                C. warned             D. believed

40. A. angrily                B. slowly                C. immediately      D. hardly

41. A. rule                    B. book                 C. child                  D. watch

42. A. way                   B. chance               C. lesson               D. smile

43. A. threw                 B. sent                   C. gave                  D. caught

44. A. came                 B. knew                 C. succeeded         D. suggested

45. A. beautiful             B. smart                 C. peaceful            D. quick

适用于高流程低流量的泵是（）

A、往复泵

B、离心泵

C、轴流泵

超声诊断急性胆囊炎的要点为（）

A.胆囊不一定肿大，但可有压痛

B.胆囊肿大，胆囊壁明显水肿

C.胆囊肿大，胆囊壁水肿且有压痛，胆汁透声差

D.胆囊肿大，囊内见结石回声

E.胆囊肿大，胆汁透声度降低

据所提供的原始单据，按照报关单填制规范的要求，在报关单相应的选项中，选出最合适的答案。

“包装种类”栏应填（）。

A．纸箱

B．木箱

C．裸装

D．此栏为空

在安全技术防范标准中，《安全防范系统通用图形符号》代号是：（）

A.GA／T75—94

B.GA/T70-2004

C.GA/T74—2000

D.GA/T72-2005