题干

下列能揭示原子具有核式结构的是(  )

A:α粒子散射实验

B:天然放射现象

C:电子的发现

D:氢原子光谱是线状谱

上一题 下一题 0.0难度 选择题 更新时间:2018-08-11 02:45:28

答案(点此获取答案解析)

A

同类题1

阅读以下上栏人员在生活和学习中遇到的问题,然后与下栏所提出建议相匹配

____I'm always late for school. I try not to be, but I can't. Please advise me what to do.

____I lived with my grandparents for many years. Three years ago I began to live in my school far away from my parents. They love me. But I don't know how to show my love to them. What can I do to let them know I also love them?

____I'm one of the best students in my class. But I always make some mistakes that I should not make. And now, I'm afraid to see my teachers. I just don't know how to face them. Can you tell me what I should do?

____I don't like today's life. It's just work, work and work. I work hard day by day. How bored and tired I feel!

____ My English is very poor. I am weak in writing composition(作文). I don't know how to improve it.

A. The first thing you need to do is to relax. If you have any difficulties, tell your teachers. No teacher is going to get angry with a student who wants to improve himself.

B. If you want to show your love to your parents, that's great. Make sure you remember their birthdays and buy them cards and gifts. Try to enjoy your life. Your parents want you to be happy. If you are happy , they will be happy, too.

C. You are late for school probably because you go to bed too late. I advise you to go to bed earlier and buy a clock to wake you up.

D. If you want to give your friend a big surprise, you can do something else for her rather than giving her a present. You are a student and haven't enough money to buy something expensive.

E. Don't complain. If you feel tired of work, you can go to parties or just relax. Remember this saying: All work and no play makes Jack a dull boy.

F. You should read more and recite(背诵)some good compositions. Try to write a diary in English everyday. I am sure you will improve your English by doing these things.

G. You should tell your friend that he has done something wrong. Cheating(说话) in exam is not a right thing that we should do.

同类题4

阅读下面的文言文,完成后面题目。

    程务挺,洺州平恩人也。父名振大业末仕窦建德为普乐令甚有能名诸贼不敢犯其境后历晋蒲二州刺史龙朔二年卒赠右卫大将军谥曰烈。

    务挺少随父征讨,以勇力闻,迁右领军卫中郎将。永隆中,突厥史伏念反叛,定襄道行军总管李文暕、曹怀舜、窦义昭等相次战败。又诏礼部尚书裴行俭率兵讨之,务挺为副将,仍检校丰州都督。时伏念屯于金牙山,务挺与副总管唐玄表引兵先逼之。伏念惧不能支,遂间道降于行俭,许伏念以不死。中书令裴炎以伏念惧务挺等兵势而降,非行俭之功,伏念遂伏诛。务挺以功右卫将军,封平原郡公。

    永淳二年,绥州城平县人白铁余率部落稽之党据县城反,伪称尊号,署百官,又进寇绥德,杀掠人吏,焚烧村落,诏务挺与夏州都督王方翼讨之。务挺进攻其城,拔之,生擒白铁余,尽平其余党。又以功左骁卫大将军、检校左羽林军。嗣圣初,与右领军大将军、检校右羽林军张虔勖同受则天密旨,帅兵入殿庭,废中宗为庐陵王,立豫王为皇帝。则天临朝,累受赏赐,特拜其子齐之为尚乘奉御。务挺泣请回授其弟,则天嘉之,下制褒美,乃拜其弟原州司马务忠为太子洗马。文明年,以务挺为单于道安抚大使,督军以御突厥。务挺善于绥御,威信大行,偏裨已下,无不尽力,突厥甚惮之,相率遁走,不敢近边。及裴炎下狱,务挺密表申理之,由是忤旨。务挺素与唐之奇、杜求仁友善,或构言务挺与裴炎、徐敬业皆潜相应接。则天遣左鹰扬将军裴绍业就军斩之,籍没其家。突厥闻务挺死,所在宴乐相庆,仍为务挺立祠,每出师攻战,即祈祷焉。

(选自《旧唐书·列传第三十三》,有删改)