题干

已知对任意实数x,有f(-x)=-f(x),g(-x)=g(x),且x>0时f′(x)>0,g′(x)>0,
则x<0时                                                              (    )

A:f′(x)>0,g′(x)>0

B:f′(x)>0,g′(x)<0

C:f′(x)<0,g′(x)>0

D:f′(x)<0,g′(x)<0

上一题 下一题 0.0难度 选择题 更新时间:2019-03-08 09:23:26

答案(点此获取答案解析)

B

同类题2

阅读下面5个人喜欢的电视节目的叙述,并从5个相关信息里中选出合适的信息。(5分)

____ . Although Rob leads a quiet life in a small village, that doesn’t stop him from wanting to find out about the latest scientific development.
____ . Bella enjoys eating out but can’t afford to spend very much at the moment as she is saving for a holiday. She has never learnt how to cook, so now might be quite a good time to find out!
____ . Dan is interested in taking wildlife photographs and enjoys the kind of program
which gives him a chance to see a professional photographer at work.
____ . Gina is a music teacher. Although she prefers classical music, she likes to know the kind of music that interests the teenagers she teaches.  
____ . Bon’s wife is in hospital. He wants to find a program suitable for his three-year-old son while he does the housework and cooks a meal.  


A. TV1 7:20 pm  Find out more about Australia’s animal life. This film was made last year by one of Australia’s best- known photographers, Dougie Bond. He spent over 200 hours filming the birds, animals and fish in Australian bushes.
B. TV3 9:00 pm  The science program is about the latest technology and medicine. This week, cars that run on sunlight and story of one baby’s fight to live.
C. TV3 7:40 pm  This is the program that tells you all about what’s happening on the music scene and tomorrow’s young artists.
D. TV1 5:15 pm  Busy parents? Bored children? Do you want something educational to entertain your children while you do something else? This popular program is for the under-fives. More music, fun, songs and games with Carla and Larry.
E. TV2 8:45 pm  If you have always wanted to cook, now’s your chance to learn. In the studio,there are two chefs who will teach you some simple recipes step by step.


同类题4

阅读下面的文言文,完成下列小题。

观周

    孔子谓南宫敬叔①曰:“吾闻老聃博古知今,通礼乐之原,明道德之归,则吾师也,今将往矣。”对曰:“谨受命。”

    遂言于鲁君曰:“臣受先臣②之命云:‘孔子圣人之后也。其祖弗父何③,始有宋国而授厉公。及正考父佐戴、武、宣,三命兹益恭。故其鼎铭曰:一命而偻④,再命而伛,三命而俯,循墙而走,亦莫余敢侮。饘⑤于是,粥于是,以糊其口,其恭俭也若此。臧孙纥有言:圣人之后,若不当世,则必有明君而达者焉。孔子少而好礼,其将在矣。’属臣曰:‘汝必师之。’今孔子将适周,观先王之遗制,考礼乐之所极,斯大业也!君盍以乘资之?臣请与往。”

    公曰:“诺。”与孔子车一乘,马二匹,竖子侍御。敬叔与俱。至周,问礼于老聃,访乐于苌弘,历郊社之所,考明堂之则,察庙朝之度。于是喟然曰:“吾乃今知周公之圣,与周之所以王也。”

    孔子观乎明堂,睹四门墉⑥,有尧舜之容,桀纣之象,而各有善恶之状,兴废之诫焉。又有周公相成王,抱之负斧扆⑦南面以朝诸侯之图焉。徘徊而望之,谓从者曰:“此周公所以盛也。夫明镜所以察形,往古者所以知今。人主不务袭迹于其所以安存,而忽怠所以危亡,是犹未有以异于却走而欲求及前人也,岂不惑哉!”

    及去周,老子送之,曰:“吾闻富贵者送人以财,仁者送人以言。吾虽不能富贵,而窃仁者之号,请送子以言乎:凡当今之士,聪明深察而近于死者,好讥议人者也。博辩闳达而危其身,好发人之恶者也。无以有己为人子者,无以恶己为人臣者。”孔子曰:“敬奉教。”

    自周反鲁,道弥尊矣。远方弟子之进,盖三千焉。

(取材于《孔子家语》,有改动)

【注释】①南宫敬叔:鲁国大夫。②先臣:指南宫敬叔已去世的父亲。③弗父何:和下文的正考父、臧孙纥都是孔子的祖先。④偻:弯着背,表示恭敬。⑤饘(zhān):稠粥,这里用作动词,煮稠粥。⑥墉:墙壁。⑦斧扆(yǐ):古代天子所用的状如屏风的器物,高八尺,上绣斧形图案。