题干

方程x2=x的两根分别为(   )

A:x1=-1,x2=0

B:x1=1,x2=0

C:x1=-1,x2=1

D:x1=1,x2=1

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答案(点此获取答案解析)

B

同类题3

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词,或填入括号中所给单词的正确形式(每空不多于3个单词)。

    We are living in a time when the world is becoming a “village”. People travel around the world ____ sightseeing, studying, working or volunteering. Perhaps in the near future, you will also become one of those people.

    Spending time in a foreign country is an____ (excite) and life-changing experience. You see different sceneries, taste nice food and meet people with all kinds of backgrounds. And ____ (important) thing of all, you explore and even become a part of the local culture.

    Your stereotypes(成见) are broken down. You may find French people are not always “romantic”. ____ (America) don't eat McDonald's all the time. And you won't get malaria(疟疾) from a mosquito bite(蚊子叮咬) in Africa.

    ____, culture shock may hit you. Things you take for granted(认为理所当然) at home may no longer be that way in a foreign country. Not everyone thinks like you or does things the way you've always____ (do). Their tea tastes different. They don't talk____ (loud) in restaurants. Some might not care much about your life, ____ you may even feel they are a bit cold. It is not better or worse. It is just different. ____ you can do is to take in the differences, while trying to be respectful and humble(谦虚的). Each time you open up____ (you) mind a little more, you become a better person.

同类题4

阅读下面的文言文,完成文后各题。

    袁者,楚人也,字丝。父故为群盗,徙处安陵。高后时,盎尝为吕禄舍人。及孝文帝即位,盎兄哙任盎为中郎。

    绛侯①为丞相,朝罢趋出,意得甚。上礼之恭,常自送之。袁盎进曰:“陛下以丞相何如人?”上曰:“社稷臣。”盎曰:“绛侯所谓功臣非社稷臣社稷臣主在与在主亡与亡方吕后时诸吕用事擅相王刘氏不绝如带是时绛侯为太尉主兵柄弗能正。吕后崩,大臣相与共畔诸吕,太尉主兵,适会其成功,所谓功臣,非社稷臣。丞相如有骄主色,陛下谦让,臣主失礼,窃为陛下不取也。”后朝,上益庄,丞相益畏。已而绛侯望袁盎曰:“吾与而兄善,今儿廷毁我!”盎遂不谢

    及绛侯免相之国,国人上书告以为反,征系清室,宗室诸公莫敢为言,唯袁盎明绛侯无罪。绛侯得释,盎颇有力。绛侯乃大与盎结交。

    袁盎常引大体忼慨。宦者赵同以数幸,常害袁盎,袁盎患之。盎兄子种为常侍骑,持节夹乘,说盎曰:“君与斗,廷辱之,使其毁不用。”孝文帝出,赵同参乘,袁盎伏车前曰:“臣闻天子所与共六尺舆者,皆天下豪英。今汉虽乏人,陛下独奈何与刀锯余人载!”于是上笑,下赵同。赵同泣下车。

    上幸上林②,皇后、慎夫人从。其在禁中,常同席坐。及坐,郎署长布席,袁盎引却慎夫人坐。慎夫人怒,不肯坐。上亦怒,起,入禁中。盎因前说曰:“臣闻尊卑有序则上下和。今陛下既已立后,慎夫人乃妾,妾主岂可与同坐哉!适所以失尊卑矣。且陛下幸之,即厚赐之。陛下所以为慎夫人,适所以祸之。陛下独不见‘人彘’乎?”于是上乃说,召语慎夫人。慎夫人赐盎金五十斤。

    然袁盎亦以数直谏,不得久居中,调为陇西都尉。

(节选自司马迁《史记》,有删改)

【注】①绛侯:即周勃,刘邦的开国大臣。②上林:秦汉时皇家苑囿。