先化简,再求值: (1)3x2-(2x2-x+1)+2(-3+x-x2),其中x

题型:解答题

问题:

先化简,再求值:

(1)3x2-(2x2-x+1)+2(-3+x-x2),其中x=-3;

(2)(3x-4y+2xy)-(2x-5y+5xy),其中x+y=3,xy=-2.

考点:整式的加减
题型:解答题

(1)从H、C、O三种元素中,选择适当的元素,组成一种符合下列内容的物质,请用化学式表示。

(2)用上表的中四种具体物质,写出一种物质分解反应或二种物质它们之间相互反应的化学方程式:

①___________________________;

②___________________________。

题型:解答题

房地产置业投资是指面向现有运行中的房地产,其投资目的是()。

A.获取投资收益

B.获取有价值的资源

C.获取开发利润

D.获取物业所有权或使用权

题型:解答题

Many difficulties have         as a result of the change over to a new type of fuel.

A.risen

B.raised

C.arisen

D.arrived

题型:解答题

男,53岁,胸痛1月余加重2周,CT检查,最可能的诊断为()

A.右侧石棉肺胸膜斑

B.右侧良性胸膜间皮瘤

C.右侧恶性胸膜间皮瘤

D.右侧胸膜转移瘤

E.右侧胸膜弥漫增厚

题型:解答题
Learning to save money when you're young is an important lesson. All good lessons and habits begin early, and saving is a skill that everyone __36__. Many people—adults included—do not have a good __37__ of saving for the long run.
I have been _38__ to learn this lesson early because I have had a grass cutting business since I was 10 years old. 39__ the money I make I spend about 10 percent and save the other 90.
Making sure you save and don't spend too much is a good way to __40__ wealth. I have put my earnings in a bank. Many teens I know spend all the money they earn so it never has a chance to _41__. Young people should __42_ that their teenage years are a great time to begin saving.
If you have a job at high school, you _43__ have fun with some of the money. But you should also save some __44__ it will grow. Then you can begin planning for your future. When you spend money, you not only lose that money, __45__ lose the interest you could have earned by saving it.
After high school, college is __46__, with expenses such as food and rent. If you can  __47__ a good percentage of the money you earn as a teen, going to college and buying a house will be much easier. If you are in your thirties without any savings, you will always have to __48__.
Later in life it can be hard to start saving _49__ general  cost of living is more expensive and you may only have enough to pay your _50__. If you want to buy a house and have a family, you need money to start with, which __51__ saving.
Many say money cannot make you happy, and this is true. But money can help you to lead a __52__ life.
Saving early will mean you will have to work for fewer years when you are older. It will also __53___ you to spend time doing the things that you want to do.__54__, it will mean you can live the way you want to without  55__.
小题1:
A.needsB.likesC.arrangesD.expects
小题2:
A.knowledgeB.experienceC.formD.sense
小题3:
A.foolishB.fundamentalC.luckyD.grateful
小题4:
A.WithB.OfC.InD.From
小题5:
A.divide upB.build upC.keep upD.make up
小题6:
A.breakB.runC.makeD.grow
小题7:
A.recognizeB.realizeC.researchD.doubt
小题8:
A.mustB.dareC.shouldD.may
小题9:
A.so thatB.in caseC.in thatD.but for
小题10:
A.butB.andC.alsoD.or
小题11:
A.expensiveB.cheapC.boringD.bitter
小题12:
A.hold outB.hold upC.hold ontoD.hold back
小题13:
A.surviveB.struggleC.tolerateD.die
小题14:
A.ifB.as long asC.whileD.since
小题15:
A.billsB.taxesC.attentionD.consequences
小题16:
A.results fromB.gets fromC.comes fromD.escapes from
小题17:
A.happyB.simpleC.miserableD.secure
小题18:
A.forbidB.allowC.AdviseD.request
小题19:
A.In additionB.Above allC.On the contraryD.Believe it or not
小题20:
A.consultingB.worryingC.restingD.thinking
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