题干

对人体具有保健作用,科学家把它誉为人体的“第七类营养素”的是(  )

A:蛋白质

B:维生素

C:胡萝卜素

D:膳食纤维

上一题 下一题 0.0难度 选择题 更新时间:2017-09-02 02:24:42

答案(点此获取答案解析)

D

同类题2

阅读理解。阅读下列短文, 从给的四个选项 (A、B、C和D) 中, 选出最佳选项。   

    The Renaissance,considered by modern scholars to have been the time between 1,300 and 1,600,was a period of European history when many new inventions and beliefs came into being.

    The Renaissance is traced back to rich Italian cities such as Florence,Milan,and Venice.In these cities businessmen started to spend their extra money on things like painting and education,and to consider new techniques of banking and systems of government.A new type of scholar,the humanist(人文主义者)arose.Humanism was concerned with humankind and culture.Latin and Greek,literature and philosophy,music and mathematics were among the subjects humanists studied.

    The Renaissance gave rise to new forms of painting and  sculpture.During  the  Renaissance,artists were no longer regarded as mere artisans(工匠).Many artists drew on mathematics in order to become more accurate in their measurements(度量)and to make sure an object was presented in realistic proportions.They also studied the way light hits objects and the ways our eyes perceive it.A new kind of paint,called oil paint,was invented.

    The Renaissance affected all of the society.Many people became interested in politics,and the world outside their towns.They became explorers,businessmen,etc.The effect on religion was especially strong.In the Middle Ages people were primarily concerned with serving the church and getting to heaven.But the increase in arts  and education gave  people things to look forward to in life,and made them lose interest in the church.

    The  Renaissance  produced  many  great minds.Leonardo da Vinci was one of the greatest,although he was not regarded that way at the time.Among his many works of art were Mona Lisa and The Last Supper.He is also regarded as a great inventor,and is credited for coming up with the idea of the helicopter.

同类题4

阅读文言文,回答问题

【甲】愚公移山

    大行、王屋二山,方七百里,高万仞,本在冀州之南,河阳之北。北山愚公者,年且九十,面山而居。惩山北之塞,出入之迂也,聚室而谋曰:“吾与汝毕力平险,指通豫南,达于汉阳,可乎?”杂然相许。其妻献疑曰:“以君之力,曾不能损魁父之丘,如太行、王屋何?且焉置土石?”杂曰:“投诸渤海之尾,隐土之北。”遂率子孙荷担者三夫,叩石垦壤,箕畚运于渤海之尾。邻人京城氏之孀妻有遗男,始龀,跳往助之。寒暑易节,始一反焉。河曲智叟笑而止之曰:“甚矣,汝之不惠!以残年余力,曾不能毁山之一毛,其如土石何?”北山愚公长息曰:“汝心之固,固不可彻,曾不若孀妻弱子。虽我之死,有子存焉;子又生孙,孙又生子;子又有子,子又有孙;子子孙孙无穷匮也,而山不加增,何苦而不平?”河曲智叟亡以应。操蛇之神闻之,惧其不已也,告之于帝。帝感其诚,命夸娥氏二子负二山,一厝朔东,一厝雍南。自此,冀之南,汉之阴,无陇断焉。

【乙】蜀之鄙有二僧

    蜀之鄙①有二僧,其一贫,其一富。贫者语于富者曰:“吾欲之南海② ,何如?”富者曰:“子何恃而往?”曰:“吾一瓶③一钵④足矣。”富者曰:“吾数年来欲买舟而下,犹未能也。子何恃而往!”越明年,贫者自南海还,以告富者。富者有惭色。西蜀之去南海,不知其几 千里也,僧富者不能至,而贫者至焉。人之立志,顾⑤ 不如蜀鄙之僧哉!

【注释】①鄙:边境。②南海:指佛教圣地普陀山,在今浙江定海县东的海上。③瓶:水瓶。④钵;和尚用来盛饭食的器皿。⑤顾:难道,反而。