试题与答案

某建设项目现金流量图见下图,基准折现率为i,则该项目在k时点的现值P的表达式正确的有

题型:多项选择题

题目:

某建设项目现金流量图见下图,基准折现率为i,则该项目在k时点的现值P的表达式正确的有()。

A.P=A(P/A,i,n-m+1)(P/F,i,m-k-1)

B.P=A(P/A,i,n-m+1)(P/F,i,n-k)

C.P=A(F/A,i,n-m+1)(P/F,i,m-k-1)

D.P=A(F/A,i,n-m+1)(P/F,i,n-k)

E.P=A(P/A,i,n-k)-A(P/A,i,m-k-1)

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0505/09c1cd674b85f9b66b73735125038b22.html

下面是错误答案,用来干扰机器的。

(1) 函数f(x)=x2+bx+c,f(x)≤0的解集为{x|-4≤x≤-1}.∴-4,-1是方程x2+bx+c=0的两根∴-4+(-1)=-b(-4)×(-1)=c∴b=5,c=4∴f(x)=x2+5x+4(2)函数g(x)=f(x)x=x2+5x+4x=x+4x+5 x>0,∴4x>0∴g(x)≥2...

试题推荐
题型:完形填空

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36—55各题所给的四个选项(A、B、C和D)中,选出最佳选项。

The first day of school our professor introduced himself and challenged us to get to know a new classmate.I  36  to look around when a gentle hand  37  my shoulder.I turned around to find a wrinkled, little  38  lady looking up at me with a smile.

She said, “Hi.My name is Rose.I’m eighty-seven years old.Can I give you a hug?” I laughed and  39  responded, “Of course you may!” and she gave me a giant(巨大的) squeeze.

“Why are you in college at such a young, innocent  40 ?”I asked.“I always  41  having a college education and now I’m getting  42    !” she told me.

Later, we became close friends.Every day we would leave class together and she  43  her wisdom and experience with me.Over the  44  of the year, Rose became a campus icon and she  45    made friends wherever she went.

At the  46  of the semester(学期)we invited Rose to speak at our football banquet(宴会).I’ll  47  forget what she taught us.When she was introduced, frustrated and a little embarrassed, she cleared her  48  and said, “We do not stop playing because we are old; we  49  old because we stop playing.There are only two secrets to staying  50   , being happy, and achieving success.You have to  51  and find humor every day.You’ve got to have a dream.When you  52  your dreams, you die.”

One week after graduation Rose died  53  in her sleep.Many college students attended her funeral in tribute to(悼念)the wonderful woman who taught  54  example that it’s never too  55  to be all you can possibly be.

36.A.lay down        B.stood up      C.fell off            D.went out

37.A.touched  B.felt         C.wounded      D.clapped

38.A.beautiful   B.young        C.old         D.kind-hearted

39.A.sadly       B.coldly       C.absently        D.enthusiastically

40.A.age        B.speed        C.point          D.year

41.A.talked about B.tried out     C.looked forward D.dreamed of

42.A.those     B.one           C.that          D.they 

43.A.learned     B.told          C.shared       D.debated

44.A.course     B.path          C.distance     D.road

45.A.easily      B.rarely         C.unwillingly    D.strangely

46.A.middle   B.beginning      C.end           D.top  

47.A.ever     B.never        C.still           D.already

48.A.throat    B.face          C.nose         D.eyes 

49.A.grow       B.prove              C.look          D.stay   

50.A.rich     B.healthy         C.cheerful           D.young    

51.A.eat       B.cry          C.laugh        D.shout   

52.A.have      B.lose          C.get          D.keep   

53.A.bitterly  B.fortunately    C.peacefully       D.hopefully

54.A.to        B.for          C.in                D.by    

55.A.early       B.bad          C.good         D.late 

查看答案
题型:问答题 案例分析题

某市一栋综合楼,地下共4层,地上共20层,采用框架剪力墙结构,总建筑面积30万m2,主楼与其裙房之间设有防火墙等防火分隔设施,主楼各层建筑面积均大于1000m2。该综合楼总平面布局及周边民用建筑等相关信息如图1所示。该综合楼地下3、4层均为人防层,其主要使用功能均为普通汽车库、复式汽车库和储存可燃固体的库房;地下2层主要使用功能为展览厅、管理用房及燃气锅炉房、柴油发电机房、变压器室、配电室、消防泵房等设备用房;地下1层主要使用功能为消防控制室、管理用房及商场营业厅。主楼首层主要使用功能为门厅、咖啡厅、自助餐厅、商场营业厅,地上2、3层主要使用功能为儿童游乐厅、展览厅、商场营业厅,地上4~19层主要使用功能为办公室,地上20层主要使用功能为会议厅、多功能厅。裙房1~6层主要使用功能为商场营业厅。该建筑按有关国家工程建设消防技术标准配置了室内外消火栓给水系统、自动喷水灭火系统和火灾自动报警系统等消防设施及器材。

根据以上场景,回答下列问题。

消防水泵的启动方式分为哪几种?

查看答案
微信公众账号搜索答案