题干

若a>1,则a+
1
a
-
1
的最小值是(    )

A:a

B:2aa-1

C:2

D:3

上一题 下一题 0.0难度 选择题 更新时间:2016-07-05 08:25:04

答案(点此获取答案解析)

D

同类题1

根据短文内容,从短文后的选项中选出能填人空白处的最佳选项。选项中有两项为多余选项。

    While it is impossible to live completely free of stress, it is possible to prevent stress as well as reduce its effect when it can't be avoided.____

    ____When you are nervous, angry or upset, try releasing the pressure through exercise or physical activity. Running, walking, playing tennis, and working in your garden are just some of the activities you might try.

    Take care of yourself ____If you easily get angry and can't sleep well enough,or if you're not eating properly, it will be more likely that you will fall into   stressful situations. If stress repeatedly keeps you from sleeping, you should consult a doctor.

    Make time for yourself Schedule time for both work and entertainment. Don't forget, play can be just as important to your overall well-being as work.____Gowindow-shopping or work on a hobby. Allow yourself at least a half hour each  day todo something you enjoy.

    Make a list of things to do   Stress can result from disorganization and a feeling that “there's so much to do,and not enough time”____ Therefore, you may not achieve anything.Instead,make a list of everything you have to do,then do one thing at atime,  checking off each task as it is completed. Set out to do the most important task first.

A. Try physical activity.

B. Do whatever you like and want to do.

C. Trying to take care of everything at once can be too much for you.

D. You could smile to yourself in front of a mirror every day.

E. The following are suggestions for ways to deal with stress.

F. You should make every effort to eat well and get enough rest.

G. You need a break from your daily routine to just relax and have fun.

同类题2

阅读下面文言文,回答问题。

            【甲】《生于忧患 死于安乐》

      舜发于畎亩之中,傅说举于版筑之间,胶鬲举于鱼盐之中,管夷吾举于士,孙叔敖举于海,百里奚举于市。故天将降大任于是人也,必先苦其心志,劳其筋骨,饿其体肤,空乏其身,行拂乱其所为,所以动心忍性,曾益其所不能。

      人恒过然后能改,困于心衡于虑而后作,征于色发于声而后喻。入则无法家拂士,出则无敌国外患者,国恒亡,然后知生于忧患而死于安乐也。

                                                                                                                                                                     (选自《孟子•告子下》)

【乙】《郑人为盖》

      郑之鄙人学为盖。三年而大旱,无所用,弃而为秸槔。三年而大雨,又无所用,则还为盖焉。未几盗起,民尽戎服,鲜用盖者。欲学为兵,则老矣。

      越有善农者,凿田种稻,三年皆涝。人谓宜泄水种黍,弗听,而仍其旧,乃大旱连岁。计其获,则偿歉而赢焉。

      故曰:“旱斯具舟,热斯具裘。天下名言也!”

                                                                                                                                                                      (选自《郁离子》)