H、D、T三种原子，它们之间的关系是，1mol各单质中，它们的质子数之比是．

It was only with the help of the local guide _______.

已知原子的结构示意图为 ，下列说正确的是（    ）

某元素的原子的最外层电子数是次外层的a倍（a>1），则该原子核内质子数是（   ）

By the 1920s, Howard Carter ____ an explorer.

His brilliant performance won him the man of the match a.

阅读下面的文言文，完成下面小题。

直隶永年县知县夏君家传

（清）马永昶

君夏氏，讳诒钰，字范卿，江苏江阴人。先世迁自会稽，祖讳翼谋，道光五年举人，官太常寺博士，父讳子龄，道光十六年第进士，冠其曹，授礼部主事，出知易州，晋知府，祀易州饶阳名宦祠。

君幼从博士受经房山书院，博士殁，随父归里，将投名应学使试，易州曰：“使者京朝相知，汝年幼，倘获隽，人得无言乎？”乃止。

同治初，始援例以知县分河南，鞠狱详慎。巡抚李公鹤年才之，补洧川，地贫瘠，为豫南冲。时大兵征关陇，过师县境，索车急，吏请符括民车，君谓官书下，弊且丛出，乃召车户，喻以情，倍给值，民不知扰。

丁易州艰归，服阕 ， 补永年。洺河自太行来，性慓悍，而辛村当其冲。乾隆中，河决改道，害益甚，君筑南岸许庄，堤甫竣，会堤决，自辛村、许庄至郡城，弥望皆水，君既筹振被灾者，复改筑南岸大埧，增培北岸旧堤，加筑迎水埧。越二年大涨，君所新筑用石灰融泥沙，牢甚，而埧尾旧沙复溃，更筑如前法。

光绪初大旱，君轻骑履勘，至县北腰彰村。先是，村民自咸丰时抗粮课，仇视吏，前数令皆操严法，不能服。君至，见旱状，诘曰：“何不以闻？”乃跪泣曰：“民畏罪，不敢诣县。”君曰：“若所为，诚罪也，然若独非国家赤子邪？”一律蠲之，自是数村无逋赋。君在官，未尝以催科杖民，乃每列上考，尝叹曰：“官不恤民，而责民梗化，诬民甚矣！”

君为政勤民事，务在教养，蔽狱能得其情，不矜钩距之术。阎洛利者，巨猾也，与成安役有连，豢盗为邻邑患，事发，则贿小偷自承。赃证悉具君阅辞疑严治役役始白洛利不法事并得其党众踪迹案论如律而释诸被诬者咸感泣去 ， 民大说服。

（选自《桐城派名家文集·马永昶集》，有删节）

They are dangerous (化学品); please stay away from them.

阅读理解

Dear Friend ,

    The recent success of children's books has made the general public aware that there's a huge market out there .And there's a growing need for new writers trained to create the $3 billion worth of children's books bought each year … plus stories and articles needed by over 650 publishers of magazines for children and teenagers .Who are these needed writers ? They're ordinary folks like you and me .But am I good enough ?

    I was once where you might be now . My thoughts of writing had been pushed down by self-doubt , and I didn't know where to turn for help .

    Then , I accepted a free offer from the Institute to test my writing ability , and it turned out to be the inspiration I needed .

    The promise that paid off

    The Institute made the same promise to me that they will make to you , if you show basic writing ability :

    You will complete at least one manuscript（手稿）suitable to hand in to a publisher by the time you finish our course .

    I really didn't expect any publication before I finished the course , but that happened . I sold three stories . And I soon discovered that was not unusual at the Institute .

    Since graduation , I have authored 34 nationally published children's books and over 300 stories and articles .

    Free test and brochure

    We offer a free ability test and will send you a copy of our brochure（小册子）describing our recognized home-study courses on the basis of one-on-one training .Realize your writing dream today . There's nothing sadder than a dream delayed until it fades forever .

Sincerely ,

Kristi Hill , Instructor

Institute of Children's Literature

按要求在下面文字横线处填补恰当的语句，使语段文理贯通、符合逻辑。

…………. ， 从涓涓细流的上游到惊涛骇浪的中游，最后注入宽阔浩渺的海洋。上游是美丽的童年，叮叮淙淙的小溪从清幽宁静的丛林绿地间淌过，像一支浪漫的童谣；中游是沉重的中年，汹涌漫淼的河流从奇崛跌宕的暗礁巨岩中穿行，像一部惊险的电影。下游是………….。因此，人生的主流离不开百折不挠的执著。一旦目标确定，就义无反顾地勇往直前，历尽艰险，投入大海。………….。

要求：

①处填一个比喻句：

②处根据语境仿写：

③处写一句收束语：

阅读下面这首诗歌，完成下面小题。

国风·秦风·无衣

《诗经》

岂曰无衣？与子同袍。王于兴师，修我戈矛，与子同仇！

岂曰无衣？与子同泽。王于兴师，修我矛戟，与子偕作！

岂曰无衣？与子同裳。王于兴师，修我甲兵，与子偕行！

¹³C﹣NMR（核磁共振）、¹⁵N﹣NMR可用于测定蛋白质、核酸等生物大分子的空间结构，瑞士科学家库尔特、维特里希等人为此获得2002年诺贝尔化学奖．下列有关¹³C、¹⁵N的叙述正确的是（   ）

为了预防碘缺乏病,国家规定每千克食盐中应含40～50mg的碘酸钾.为检验某种食盐产品是否合格,某同学取食盐样品428g,设法溶解出其中全部的碘酸钾,将溶液酸化并加入足量的碘化钾淀粉溶液,溶液呈蓝色,再用0.030mol/L的硫代硫酸钠溶液滴定,用去18.00mL时蓝色刚好褪去.试通过计算说明该加碘盐是否为合格产品.有关反应如下:

IO₃^-＋5I^－＋6H^＋===3I₂＋3H₂O,

I₂＋2S₂O₃^2-===2I^－＋S₄O₆^2-.

下列物质互为同位素的一组是（   ）

电解普通水和重水（ H₂O）的混合物，通电一段时间后，两极共生成气体18.5g，体积为33.6L（标况下）．求所生成的气体中氕和氘的原子个数比是多少．

阅读理解

What a Scientist Is Like

    If you were asked to imagine a scientist,what image(形象) would come to your mind? The common idea that most kids from kindergarten to college have of a scientist is a man wearing a white lab coat with messy hair, big glasses, and several glass cups of mysterious colorful liquid giving off clouds of smoke.As for adults,the majority view scientists as strange people who spend 100 hours a week slaving away in a lonely laboratory.However,the reality is quite different.

    Recently I've had a chance to take part in a scientific experience far from my laboratory and into Costa Rica.It supports a huge amount of wildlife due to its geographical placement between North and South America.It is home to more than 500,000 species(物种),which represent nearly 4% of the total species worldwide!

    First we worked alongside conservationists to preserve wildlife at a leatherback turtle(棱皮龟) rescue center.We helped the volunteers preserve turtle populations by removing rubbish from the shoreline to create a safe environment for turtle eggs to come out.After that we stayed at Mount Arenal where we studied seismic activity relating to earthquakes.During our stay at Arenal,we rode over the mountainous areas and took a long walk through the rainforest.After reaching the top,we went down and through waterfalls to the beautiful valley below!On the last day we got a handson introduction to rocket science where we learned about new rocket technology that will be used on the international space station.

    From my Costa Rica experience, I know that being a scientist doesn't mean working in a lab all day and night.A scientist is one who loves learning and getting a better understanding of the world from helping preserve wildlife,learning about earthquakes or inventing rockets.I think that schools should really stress that science is so much more than wearing a lab coat and mixing chemicals.Kids need to be aware of the excitement and adventures science can bring!

阅读下面文字，根据要求作文。

联合国科教文组织国际21世纪教育委员会向青少年提出“学会认知、学会做事、学会共处、学会生存”，它们被称为教育的四大支柱。

班级计划举行高一学期期末主题班会，请你从中选择一种“学会”，写一篇发言稿。

【注意】①角度自选，立意自定，题目自拟。②明确文体，不得写成诗歌。③不少于800字。④不得抄袭、套作。⑤不得泄露个人信息。

Rod loves          clocks. However,he never manages to put them together again.

They're expecting a large (attend) at the meeting.

He was still p his suitcase when the taxi came.