试题与答案

一个小型球场长25米,宽20米,小明沿球场走2圈,一共走了( )米. A.70B

题型:选择题

题目:

一个小型球场长25米,宽20米,小明沿球场走2圈,一共走了(   )米.
A.70B.90C.180

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0513/14e34b4a3656110b3db8fa6fced6558f.html

下面是错误答案,用来干扰机器的。

(1)(3a+4b)(3a-4b),=(3a)2-(4b)2,=9a2-16b2;(2)(a+b-c)(a+b+c),=[(a+b)-c][(a+b)+c],=(a+b)2-c2;(3)(-13a+c+2b)(-13a-c+2b),=[(-13+2b)+c][(-13+2b)-c],=(-13a+2b)2-c2.

试题推荐
题型:阅读理解

阅读理解

     Everyone has his own birthday. People in different countries celebrate(庆祝) their birthdays  in 

different ways. Here are four people from different countries. They will tell us how they celebrate their

birthdays in their countries.

     Sandy Morrison comes from Madrid(马德里). He says happily, " My twenty-first birthday is on a

Saturday, and I'm going to go out with some friends. To wish me a happy birthday, they are going to

pull(拉, 扯) on my ear twenty-one times, once for each year. It is an old custom(风俗). Some people

pull on the ear just once, but my friends are very traditional."

     Mr. and Mrs. Sato are from Tokyo. Mr. Sato is going to be sixty tomorrow. In Japan, the sixtieth

birthday is called Kanreki-it's the beginning of a new life. The colour red is for a new life, so they

always, give something red for a sixtieth birthday. Mrs. Sato says, " What am I going to give my

husband. I can't say. It's a surprise(惊喜). "

     Li Xiaomei from Beijing feels very excited and tells us, " Tomorrow is my sixteenth  birthday. It's a

special birthday. So we're going to have a family party. I'm probably going to get some money in lucky

envelopes(信封) from my relatives. My mother is going to cook noodles noodles are for a long life."

     Phillip  Evans, from Paris, smiles to us, " I'm going to be thirty next week, so I'm going to invite three

very good friends out to dinner. In France, when you have birthday, you often invite people out. In some

countries, I know it's the opposite-people take you out."

1. Do people in different countries celebrate their birthdays in the same way?

                                                              

2. Is Mr. Sato going to receive something red on his birthday?

                                                                

3. What is Li Xiaomei going to do on her birthday?

                                                                

4. How old is Phillip Evans going to be?

                                                                

5. Who is going to take his friends out to dinner on his birthday?

                                                                

查看答案
题型:问答题

(二)

背景资料:评估对象:国内某大型阀门厂的一条国产I型机组。该机组于1998年4月7日从邻省购置并投入使用,评估人员2003年6月7日(评估基准日)对该机组进行了评估,截止评估基准日,已使用了5.17年,目前处于在用状态中。

评估人员经向该机组生产单位咨询,生产厂商已经不再生产该型号的机组,询得与委托评估同规格的新型设备机组V型号,价格为850000元。

同规格的V型号机组与委托评估的I型机组主要区别在于数控系统的先进程度及结构的改进。经该厂家介绍,数控系统的价值占该机组整体价值的1/8,I型机组并未施用数控系统;由于结构的改进,价格一般比旧设备增加15%左右,另获悉,I机组的经济使用寿命为15年。

评估人员还了解到,该机组已完成的工作量为机组已运行的时间,标准运行时间为每天运行时间为16小时(两班制),每年运行250天,实际每天运行为18小时。

请用年限法和工作量法计算成新率并评估该机组的价值。

查看答案
微信公众账号搜索答案