若关于x的方程2x2-(m+2)x+2m-2=0有两个等根,则m的值为_____

题型:填空题

问题:

若关于x的方程2x2-(m+2)x+2m-2=0有两个等根,则m的值为______.

考点:一元二次方程根的判别式
题型:填空题
完形填空(本题有15小题,每小题1分,共15分)
阅读下面短文,掌握大意,然后从每题所给的 A、B、C、D 四个选项中选出最佳选项。

“I can’t  believe what I’m hearing!” I thought to myself. Jeff was the last candidate* for president of Student Union. I really thought I should be chosen.
Later that day, I happened to pass Jeff in the dining room. I offered     1   a polite “Congratulations” and walked to my usual table. To my   2   , Jeff came to me and put his plate beside mine.
“I’m, er – I’m just wondering if you would consider coming to work on my team,” he said nervously. “You are really   3   and you would be a great partner.”
“I don't think so,” I replied, feeling unsure.
“Well,   4   you change your mind, you can tell me tomorrow.” he said before moving to another table.
All that night, I thought about the    5   from Jeff. Maybe being a part of the election* process would give me a chance to make important changes at our school. I decided to    6       Jeff.
    7   of all, I began to create a catchy*advertisement. Within a few days, we     8  a poster with Jeff’s pictures showing him in a number of activities. No one could walk through any hallway     9    passing Jeff’s smiling face.
My next step was to    10 what new activities students would like to have at our school. Many of them wanted a chess club and a volleyball team.
With the information I had collected, Jeff met with the headmaster. The headmaster agreed to add    11  we want to our school program.
With my help, Jeff and our ideas were well received at school.
An eighth grader said, “    12   will be exciting to have Jeff as president.”
    13   these words made my heart filled with pride. I had wanted to become president of Student Union to make a difference. Now I achieved that. Jeff became the most popular candidate and I was a large part of his     14   . The fact that it has made a    15   in other people’s lives is the real prize. What a great feeling!
小题1:
A.usB.himC.her D.them
小题2:
A.surpriseB.luckC.funD.love
小题3:
A.tiredB.happyC.smartD.busy
小题4:
A.ifB.because C.afterD.while
小题5:
A.messageB.presentC.dreamD.offer
小题6:
A.refuseB.leaveC.agreeD.join
小题7:
A.FirstB.SecondC.ThirdD.Last
小题8:
A.sentB.inventedC.designedD.bought
小题9:
A.forB.fromC.withD.without
小题10:
A.take outB.give outC.work outD.find out
小题11:
A.everywhereB.somewhereC.everything D.nothing
小题12:
A.ThisB.ItC.HeD.We
小题13:
A.HearingB.SeeingC.ThinkingD.Hoping
小题14:
A.exerciseB.classC.familyD.success
小题15:
A.friendB.differenceC.mistakeD.living
题型:填空题

已知圆心角为1200的扇形的弧长为12π,那么此扇形的半径为(   ).

A.12

B.18

C.36

D.45

题型:填空题

a mol H2SO4中含有b个氧原子,则阿伏加德罗常数可以表示为(  )

A.

a
4b

B.

b
4a

C.

a
b

D.

b
a

题型:填空题

处置公允价值模式计量的投资性房地产时,原计入所有者权益(资本公积)的部分应当转入处置当期损益(其他业务成本)。()

题型:填空题

马尔萨斯的人口理论指出:人类财富是按算术级数增长的,而人口则是按几何级数增长的,地球会因发生人口爆炸而灭亡,然而,一百多年过去了,并没有发生什么人口爆炸,这主要是因为( )

A.灾难、瘟疫,战争减缓了人口的增长

B.马尔萨斯的理论是错误的

C.时间还不够长

D.人口增长具有内在约束机制,而且科技的进步创造了大量的社会财富

更多题库