在自动控制系统中，( )是旋转式的调节阀，具有优良的密封性和安全可靠 A．气动O形

第二节 完形填空（共20小题，每小题1.5分，共30分）   

阅读下面短文，掌握其大意，从每题所给的A、B、C、D四个选项中，选出最佳选项并在答题卡上将该项涂黑。

More good things come from small things

About a year ago, a couple with three children moved into the apartment next door to me.

I never heard any  36 from the children, but the parents were always shouting at the kids.

We  37 often in the hallways when we were coming or going. I  38 spoke, but the only   39 I ever got was a hello from the four – year – old girl.

I usually go out for breakfast and one day when I  40 they were just coming from their apartment and the little girl was holding the door   41 for the others. I  42 in the car doing unnecessary things because I didn’t like to be snubbed（冷落）. The parents were   43 her to hurry and get in the car, I looked up and saw the little girl was   44 holding the door open,  45 for me.

I hurried as much as I could and   46 her. She was smiling from ear to ear. That afternoon I saw a white toy bear, I   47 the little girl and said to myself, “I   48 she would like that” so I bought it. I wrote a note   49 how much her act of kindness had touched a soft spot in an old man’s   50 .

The next day there was a   51 on the door and   52 was the little girl and her father. She was so proud of her bear and thanked me. Then I   53 her mother and the other children were there in the hall too. The mother and father both thanked me.

Now when we meet in the hall we all speak, and in a   54 manner, I might add.  55 time

passes, I don’t hear that shouting as often. In fact, hardly at all. 

36．A．sound                 B．noise                   C．conversation        D．crying

37．A．met                    B．saw                     C．visited                 D．gathered

38．A．never                  B．sometimes           C．seldom                D．always

39．A．reward                B．action                 C．answer                D．prize

40．A．moved                B．returned              C．started                 D．drove

41．A．open                   B．closed                 C．fit                       D．active

42．A．stopped               B．kept                    C．worked               D．remained

43．A．suggesting           B．telling                 C．forcing                D．making

44．A．ever                    B．even                   C．still                     D．yet

45．A．waiting               B．calling                C．leaving                D．asking

46．A． replaced             B．encouraged          C．ignored               D．thanked

47．A．thought about      B．thought of           C．thought over        D．thought out

48．A．decide                 B．am lucky             C．am sure               D．doubt

49．A．saying                 B．stating                C．reporting             D．writing

50．A．mind                  B．body                   C．thought               D．heart

51．A．hit                      B．knock                 C．drop                   D．beat

52．A．she                     B．it                        C．they                    D．he

53．A．noticed               B．watched              C．recognized           D．felt

54．A．kindly                 B．politely               C．coldly                 D．friendly

55．A．When                 B．Since                  C．As                      D．While

周代文学在精神和风格上有这样的特征是（）。

A、和谐典雅

B、婉而多风

C、个性张扬

某企业拟投资一个项目，估算总投资11913万元。预计年销售收入6488万元，税后财务内部收益率(IRR)为11.59%。该项目存在两个主要风险变量，即产品销售价格和关键原料价格可能与预期有所不同。产品销售价格估计值为3500元/t，该关键原料价格估计值为400元/kg，产品销售价格可能出现三种情况：有50%的可能为原估计值3500元/t，有30%的可能为 3000元/t，有20%的可能为2500元/t；该关键原料的价格可能出现两种情况：有70%的可能为原估计值400元/kg，有30%的可能为450元/kg。各种可能出现的情况以及对应的IRR见下表。
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　产品销售价格与原材料价格不同情况下对应的IRR表

状态	产品销售价格/(元/t)	原料价格/(元/kg)	IRR（%）
1	3500	400	11.59
2	3500	450	11.23
3	3000	400	8.56
4	3000	450	8.17
5	2500	400	5.19
6	2500	450	4.75

【问题】
1．画出概率树。
2．采用概率树分析方法，计算IRR的期望值。

色调是色光光谱上各种不同（）的可见光在视觉上的表现。

A.波长

B.反射波

C.磁场

D.明度

坡地的建筑物吊脚架空层、( )架空层，设计加以利用并有围护结构的，层高在2.20m及以上的部位应计算全面积。

A．深基础

B．圈梁

C．过梁

D．纵横