题干

关于热学的下列说法正确的是(   )

A:当一定质量的理想气体吸热时,其内能可能减小

B:当两个分子之间的距离靠近的过程中,分子间的作用力将增大

C:根据热力学第二定律可知,热量不可能从低温物体传到高温物体。

D:物体的速度增大时,物体的内能增大。

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答案(点此获取答案解析)

A

同类题3

   There are over 800 boarding (寄宿) schools in the UK with students from home and foreign countries. Boarding schools started hundreds of years ago in the country. But the earliest boarding schools were set up for white, rich boys only. Now both boys and girls can go to boarding schools from the age of 7 to 18.
What to do
   In the UK, boarding schools have three terms in a school year, with about 13 weeks in each term. Students study and live together. They can’t go outside if they are not allowed to. In some schools, each student has his or her subject plan. Besides the usual classrooms and laboratories, the boarding schools have lots of other facilities for their students, including music rooms, boats, swimming pools, cinemas and theatres. Most boarding schools have a “light out” time. So when it's time to go to bed, all the lights in the bedrooms are turned off. There are house-masters to take care of students all the time, especially after school hours.
What to wear 
   Nearly all students at boarding schools wear a school uniform. Boys usually wear a shirt and a tie, and girls wear a white blouse, sometimes also a tie and a skirt. As students get older, the rules become less strict.
_______________
   In the UK, boarding schools provide students with delicious food. They can choose to have a full English breakfast or simply bread. They can also choose between a meal with no meat and another meal at lunch and dinner. And there is always self-service for salad (沙拉), other side dishes and a dessert. Students can also make themselves something to eat at any time in a kitchen, or drink tea or have a snack between meals.

同类题5

阅读下文,回答问题

苦难,开出幸运的花

张海贞

    ①许多幸运者的背后都有很多跟幸运无关的故事。

    ②在记忆中,我特别喜欢的一位签约作者。她的微信公众号开通两个月便收获两万多粉丝,很多人都惊呼:“简直太幸运了!”我认为,这跟运气关系不大。她十年前开始写作,为了圆自己的作家梦,她不顾别人异样的目光默默地写作,笔耕不辍十年,遭到的退稿不计其数,但这些都不妨碍她继续写作。那时,无数个日夜,她努力爬格子,希望自己所写的东西能够得到大家的认可。她就像石缝间的小草,拼命地向上生长,渴望有一天能沐浴在和煦的阳光之下。终于,苦尽甘来,她写了许多被转载上百次的文字,收获了无数的粉丝。

    ③我还想起了《中国达人秀》上的张春广,以收废品为生。他自小迷恋舞蹈,每次看到舞台上的演员跳舞他便热血沸腾,梦想有一天能够像他们一样。然而,对于贫苦家庭的孩子来说,跳舞是一种奢侈,幼小的他只能将梦想埋在心里。张春广平时爱跳“机械舞”,他爱跳舞这一举动还被乡邻认为是神经病,妻子也极力反对他,为此两个人没少吵架。但迷恋舞蹈的张春广却不愿放弃,他买回舞蹈光碟在家练习跳舞。

    ④2014年,张春广鼓足勇气报名了《中国达人秀》。他穿着几十元的灰色衣裤,背着一个纺织袋、肩膀一高一低,一口浓浓的乡音,刚一上场便惨遭其中一位评委灭灯。随后,在表演中,他跳了一段自创的“捡废品机械舞”。只见他时而轻松灵动得像一条蛇,时而笨拙僵硬得像一个机器人。他的这段自创舞蹈得到了现场雷鸣般的掌声,起初灭灯的评委也不得不承认,自己看走了眼。当时主持人问他为什么要来参加节目,他的一句话感动了全场人:“我只是为了证明自己不是神经病!”随后现场所有观众起立,这是达人秀舞台上从未有过的一幕。无疑,他赢得了尊重,很多人视他为“励志榜样”。

    ⑤我不禁又想起了我的一位初中同学,她小时候跟随父母迁到了新疆。我们关系很好,一直保持联系。她自小就喜欢芭蕾舞,母亲为了满足她的愿望,将她送入舞蹈班。她如愿成了一名芭蕾舞演员,经常在网上晒自己演出的照片,我心里甭提多羡慕了,羡慕她那光彩照人的生活。

    ⑥去年冬天,她回老家,约我见面。那天屋外雪花飞扬,放眼望去窗外的几株梅花开得正旺。我们聊起这些年的经历,两个人激动万分。不过,让我印象最深的便是她那双脚。当我说羡慕她的生活时,她毫不忌讳地脱下丝袜让我看她的脚,我被吓得起了满身的鸡皮疙瘩。那双脚伤痕累累,布满了老茧,脚趾也被挤压变了形。我止不住落泪了,她却笑了,淡淡地说:“我十几年如一日地练习芭蕾,早就习以为常。这是每一位芭蕾舞演员的必经之路!”

    ⑦生活中,时常有人拿“幸运”来定义别人,其实他们背后有许多跟幸运无关的故事。当我们惊呼签约作者幸运走红之时,我们不曾想到她的笔尖里饱含着永不言弃的汗水;当我们肯定张春广独创的舞蹈之时,我们不曾看到他在家里孤独又执拗的练舞身影;也许当我们在羡慕我的初中同学那光彩照人的生活之时,我们不曾想到她面对苦难时的那份坚韧和淡然。

    ⑧在追求梦想的路上,所谓幸运不过是苦难开出的花!