已知函数f(x)、g(x),下列说法正确的是( ) A.f(x)是奇函数,g(x

题型:选择题

问题:

已知函数f(x)、g(x),下列说法正确的是(  )

A.f(x)是奇函数,g(x)是奇函数,则f(x)+g(x)是奇函数

B.f(x)是偶函数,g(x)是偶函数,则f(x)+g(x)是偶函数

C.f(x)是奇函数,g(x)是偶函数,则f(x)+g(x)一定是奇函数或偶函数

D.f(x)是奇函数,g(x)是偶函数,则f(x)+g(x)可以是奇函数或偶函数

考点:函数的奇偶性、周期性
题型:选择题

紫外线的红斑反应最强的波长是()

A.254nm

B.280nm

C.297nm

D.302nm

E.313nm

题型:选择题
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。
Why should you go to college? One important answer to this question is more __16___. As opposed to generations of the past, high school graduates today are _17___ to get the number of high-paid jobs that were __18__ available. The U.S. has been changed from a manufacturing-based economy into an economy based on ___19_, and the importance of a college education today can be _20___ to that of a high school education forty years ago. It __21__ as the gateway to better choices and more opportunity.
There are __22_ reasons as to why it is important to go to college. When students _23__ a post-secondary education, they have the opportunity to read books and listen to the __24__ of top experts in their fields. It __25__ students to think, ask questions, and __26_ new ideas, which allows for additional growth and ___27_ and provides college graduates with an edge in the job market __28__ those who have not experienced a higher education.
The importance of a college education is also because of the opportunity to __29__ valuable resources. The more connections which are __30___ during your college career, the more _31___ you will have when you begin your job search. Once you have ended your job search and have started your career, ___32__, the importance of a college education has not been exhausted. Having a college degree often __33_ greater promotion opportunity.
So, why should you go to college? The reasoning does not begin and end with the _34___ aspect. A good education is __35__ from many different viewpoints, and while the importance of a college education is quite evident for many high school students, what is often not as clear is how they will pay for that education.
小题1:
A.timeB.freedomC.respectD.opportunity
小题2:
A.likelyB.unableC.afraidD.unwilling
小题3:
A.onceB.justC.neverD.also
小题4:
A.natureB.cultureC.knowledgeD.agriculture
小题5:
A.referredB.addedC.devotedD.compared
小题6:
A.followsB.servesC.unitesD.disappears
小题7:
A.additionalB.secretC.interestingD.financial
小题8:
A.discussB.ignoreC.experienceD.imagine
小题9:
A.storiesB.requestsC.suggestionD.lecture
小题10:
A.helpsB.encouragesC.forbidsD.advises
小题11:
A.designB.exploreC.changeD.refuse
小题12:
A.developmentB.paymentC.agreementD.experiment
小题13:
A.forB.overC.inD.with
小题14:
A.admireB.satisfyC.gainD.notice
小题15:
A.removedB.collectedC.explainedD.controlled
小题16:
A.inventionsB.choicesC.worriesD.salaries
小题17:
A.besidesB.thereforeC.howeverD.otherwise
小题18:
A.savesB.includesC.ensuresD.means
小题19:
A.lifeB.characterC.communicationD.job
小题20:
A.freeB.rareC.beneficialD.absent
题型:选择题

威廉·冯·洪堡(1767年6月22日—1835年4月8日),生于德国波兹坦(Potsdam),是()的创始者。

A.柏林自由大学

B.柏林工业大学

C.柏林洪堡大学

D.波茨坦大学

题型:选择题

袋装水泥在确认或检验合格后存放()以上,质量管理部门应发出()通知,并现场标识。经重新取样检验,确认符合标准规定后方能重新签发()。

题型:选择题

在这段路的最高时速为每小时50公里。

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