Most people work because it's unavoidable. , there are some people who actually enjoy work.

等物质的量的下列烃完全燃烧，消耗氧气最多的是（   ）

已知NO₂、NO的混合气体可与NaOH溶液发生化学反应：2NO₂＋2NaOH=NaNO₂＋NaNO₃＋H₂O，NO＋NO₂＋2NaOH=2NaNO₂＋H₂O，将224 mL(标准状况下)NO和NO₂的混合气体溶于20 mL NaOH溶液中，恰好完全反应并无气体逸出。则NaOH溶液的物质的量浓度为(   )

有FeO、Fe₂O₃的混合物若干克，在足量H₂气流中加热充分反应，冷却后称得剩余固体比原混合物减轻0.8g；将等质量的原混合物与盐酸反应，欲使之完全溶解，至少需要1mol/L盐酸的体积为（   ）

The progress so far (be) very good and we are sure that the work will be finished on time.

在△ABC中，若 ，则 等于（  ）

在△ABC中，角A，B，C的对边分别为a，b，c，若 ＜0，则△ABC（   ）

That is __________ the problem lies.

元素X的离子结构示意图为 ，Y的原子结构示意图为 ， 则元素X与元素Y形成化合物的常见化学式为（   ）

一个¹²C原子的质量为akg，一个¹²C¹⁶O₂分子的质量为bkg，若以¹²C¹⁶O₂中的一个氧原子质量的1/14作为相对原子质量标准，则¹²C¹⁶O₂的相对分子质量为（   ）

下列表示正确的是（   ）

阅读理解

    Choose Your One-Day Tours!

    Tour A—Bath & Stonehenge including entrance fees to the ancient Roman bathrooms and Stonehenge—￡37 until 26 March and ￡39 thereafter.

    Visit the city with over 2, 000 years of history and Bath Abbey, the Royal Crescent and the Costume Museum. Stonehenge is one of the world's most famous prehistoric monuments dating back over 5, 000 years.

    Tour B—Oxford & Stratford including entrance fees to the University St Mary's Church Tower and Anne Hathaway's house—￡32 until 12 March and ￡36 thereafter.

    Oxford: Includes a guided tour of England's oldest university city and colleges .Look over the “city of dreaming spires(尖顶)” from St Mary's Church Tower. Stratford: Includes a guided tour exploring much of the Shakespeare wonder.

    Tour C—Windsor Castle & Hampton Court including entrance fees to Hampton Court Palace—￡34 until 11 March and ￡37 thereafter.

    Includes a guided tour of Windsor and Hampton Court, Henry Ⅷ's favourite palace. Free time to visit Windsor Castle(entrance fees not included).With 500 years of history, Hampton Court was once the home of four Kings and one Queen. Now this former royal palace is open to the public as a major tourist attraction. Visit the palace and its various historic gardens, which include the famous maze(迷宫) where it is easy to get lost!

    Tour D—Cambridge including entrance fees to the Tower of Saint Mary the Great—￡33 until 18 March and ￡37 thereafter.

    Includes a guided tour of Cambridge, the famous university town, and the gardens of the 18th century.

下列各组物质中，互为同位素的是(   )

HCOONa加热分解时，固体失重率与温度的关系如图所示，发生的反应有：

2HCOONa Na₂C₂O₄+H₂↑ ①

2HCOONa Na₂CO₃+H₂↑+CO↑②

Na₂C₂O₄ Na₂CO₃+CO↑ ③

下列说法正确的是（   ）

已知氢元素有3种同位素，氧元素也有3种同位素．假定能准确测定单个水分子的质量，则所测得数据将有种（   ）

补全对话。

Z: Hello, are you Mr. Smith from the United States?

M: Yes, Robert Smith. Please call me Robert. .

Z: My pleasure. Welcome to China. My name is Zhang Lin. You can call me Lin. This is my card.

M: Thank you. And .

Z: Oh, good, thanks. How was the journey?

M: , although a little tiring.

Z: Then let's get your things and go to the hotel now.

M: Oh, thank you. ?

Z: It's about thirty minutes' drive. By the way, we are going to have a dinner party for you this evening.

M: It's very kind of you. ?

Z: Six thirty. I'll pick you up at six o'clock.

M: OK, see you then.

Z: Bye.

A. It was OK

B. Where is the hotel

C. here is my card

D. Where shall we go

E. Thank you for meeting me

F. How many people are going there

G. What time does it begin

Knowing the result of the exam, he went home and lay in bed, ________ .

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(\)划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：

1）每处错误及其修改均仅限一词;

2）只允许修改10处，多者(从第11处起)不计分。

    The summer holiday is coming. My classmates and I are talking about how to do during the holiday. We can chose between staying at home and take a trip. If we stay at home, it is comfortable but there is no need to spend money. But in that case, we will learn little about world. If we go on a trip abroad, we can broaden your view and gain knowledges we cannot get from books. Some classmates suggest we can go to places of interest nearby. I thought that it is a good idea. It does not cost many, yet we can still learn a lot.

在 中，已知 ，且 ，则 的形状为．

下列表示反应中的相关微粒的化学用语正确的是（   ）