题目内容

【题目】现有几组物质的熔点(℃)的数据:

A组

B组

C组

D组

金刚石:3 550

Li:181

HF:-83

NaCl:801

硅晶体:1 410

Na:98

HCl:-115

KCl:776

硼晶体:2 300

K:64

HBr:-89

RbCl:718

二氧化硅:1 723

Rb:39

HI:-51

CsCl:645

据此回答下列问题:

(1)A组属于 晶体,其熔化时克服的微粒间的作用力是 。

(2)B组晶体共同的物理性质是 (填序号)。

①有金属光泽 ②导电性 ③导热性 ④延展性

(3)C组中HF熔点反常是由于 。

(4)D组晶体可能具有的性质是 (填序号)。

①硬度小 ②水溶液能导电 ③固体能导电 ④熔融状态能导电

(5)D组晶体的熔点由高到低的顺序为NaCl>KCl>RbCl>CsCl,其原因解释为 。

【答案】(1)原子 共价键

(2)①②③④

(3)HF分子间能形成氢键,其熔化时需要消耗的能量更多(只要答出HF分子间能形成氢键即可)

(4)②④

(5)D组晶体都为离子晶体,r(Na+)<r(K+)<r(Rb+)<r(Cs+),在离子所带电荷数相同的情况下,离子半径越小,晶格能越大,熔点就越高

【解析】通过读取表格中数据先判断出晶体的类型及晶体的性质,应用氢键解释HF的熔点反常,利用晶格能的大小解释离子晶体熔点的高低。

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【1】_____for Happiness

Introduction

You will move【2】______in the course of finding happiness.

The findings of【3】_____

Some【4】______toward happiness

Value your relationships

The【5】_____happiness lies in the most stable and satisfying relationships

【6】_____

yourself

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Spend money on others

Your spirit will be inspired by【7】_____the wealth.

【8】_____on the positive

You attitude would be improved when you fix your attention on good things.

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If a woman takes in enough water,her【9】_____of happiness may remain.

Conclusion

Happiness can be found if all【10】_____have been done.

【题目】用方框中所给短语的适当形式填空

congratulate…on do damage to in honour of give out judging by

1. ______ his accent, he may be from my hometown.

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【题目】语法填空

阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。

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【1】A. traditional B. preschool C. public D. special

【2】A. discussion B. bond C. routine D. agreement

【3】A. how B. why C. that D. because

【4】.A. attend B. record C. decorate D. design

【5】A. teacher B. shadow C. family D. dream

【6】A. differing B. distinguishing C. ranging D. expanding

【7】 A. without B. from C. among D. beyond

【8】A. touched B. inspired C. satisfied D. involved

【9】A. still B. even C. yet D. again

【10】A. silent B. wild C. wrong D. strong

【11】A. wrote B. polished C. spared D. shared

【12】A. encouraged B. followed C. attracted D. surrounded

【13】A. light B. laughter C. tears D. knees

【14】A. grateful B. generous C. genuine D. patient

【15】A. carrying out B. carrying on C. taking in D. taking over

【16】A. regret B. impression C. complaint D. favorite

【17】A. choices B. memories C. decisions D. plans

【18】A. meaningful B. natural C. vivid D. original

【19】A. symbol B. gift C. part D. result

【20】A. celebrate B. play C. meet D. communicate

【题目】B

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【题目】[双选]对于常温下pH为2的盐酸，叙述正确的是

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【题目】书面表达

假如你是李华，你参加了你校本周五举行的英语阅读比赛，并获得第一名。请根据以下提示用英语给你的美国笔友Tom写一封电子邮件。内容包括：

1. 描述比赛的情况；

2. 希望他提供单词的记忆方法；

3. 欢迎他到中国过春节。

注意：

1. 词数100左右；

2. 可以适当增加细节，以使行文连贯；

3. 开头语和结束语已为你写好，不计入总词数。

参考词汇：the Spring Festival春节

Dear Tom,

_________________________________________________________________________________________

_________________________________________________________________________________________

_________________________________________________________________________________________

_________________________________________________________________________________________

_________________________________________________________________________________________

_________________________________________________________________________________________

_________________________________________________________________________________________

_________________________________________________________________________________________

Yours,

Li Hua

【题目】语法单句填空

【1】—Are you familiar with the music?

—Yes. There was a time ___________ this kind of music was quite popular.

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【9】What if we meet with a situation ___________ none of us are able to deal with?

【10】A bank is the place ___________ they lend you an umbrella in fair weather and ask for it back when it begins to rain.

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