To be a professional (music) calls for many years of practice.

选择适当的短语并用其正确形式填空

补写出下列句子中的空缺部分。

若椭圆 上一点P到两焦点F₁、F₂的距离之差为2，则△PF₁F₂是（   ）

嫦娥一号担负的任务包括4项科学任务：其中有一项为探测月球土壤厚度以及氦-3的储量；地球上氦元素主要以⁴He形式存在，月球上氦元素主要以³He形式存在，已知一个¹²C原子的质量为a g，一个³He 原子的质量为b g，一个⁴He 原子的质量为c g ；现有：
①³He、⁴He的化学性质基本相同，      ②³He、⁴He具有相同的中子数 
③³He的相对原子质量约为： 6.02ⅹ10²³b，氦元素的相对原子质量为：
④³He、⁴He为氦元素的同位素，同温同压下，密度之比为：b：c
其中正确的是（      ）

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Each New Year, we wish others happiness and success. There are several—a smile, freedom, the willingness to share and the confidence that you will get what you need in life.  

    As you turn over the calendar, keep turning over your mind as well. Don't fill your future dates with past events. Just move on.  

    You want to be free of such weaknesses as complaint, hatred, and anger. Do not let the past affect your life in the present. If you cannot forgive the past, then your future will be dark.

    As long as you are useful to people, your value will never be lost. “Any of your good actions will always come back to you. Today you have the whole world for a family. What you need to feel is that everybody is part of your own family. Open your eyes and see how much you have been given. Focus on what you have rather than what you don't have. The more thankful you feel, the more you will be given. However, the more you complain, the more will be taken away from you.  

    There is always happiness when you focus on what you have. Success comes, beauty comes, and peace comes.  

A. What are the effects of success?

B. What really is the sign of success?

C. Welcome the New Year with a smile.

D. With this calmness, abilities appear naturally.

E. Take responsibility and then there is no suffering.

F. Understand that negative feelings are because of the past.

G. Never quit and keep on trying, and then you will make it.

下列各组中互为同位素的是

阅读下列材料，完成文后小题。

苏轼，字子瞻，眉州眉山人。生十年，父洵游学四方，母程氏亲授以书，闻古今成败，辄能语其要。比冠，博通经史，属文日数千言，好贾谊、陆贽书。嘉祐二年，试礼部。主司欧阳修思得轼《刑赏忠厚论》，惊喜，欲擢冠多士，犹疑其客曾巩所为，但置第二；复以《春秋》对义居第一， 殿试中乙科。后以书见修，修语梅圣俞曰：“吾当避此人出一头地。”

神宗崩，哲宗立，召为礼部郎中。轼起于忧患，不欲骤履要地，辞于宰相蔡确。确曰：“公徊翔久矣，朝中无出公右者。”卒不许。四年积以论事，为当轴者所恨。轼恐不见容，请外，知杭州。未行，谏官言前相蔡确知安州，作诗借郝处俊事以讥太皇太后。大臣议迁之岭南。轼密疏：“朝廷若薄之罪，则于皇帝治孝为不足，若深罪确，则于太皇太后仁政为小累。谓宜皇帝敕置狱逮治，太皇太后出手诏赦之，则于仁孝两得矣。”宣仁后心善轼言而不能用。轼出郊，用前执政恩例，遣内侍赐龙茶、银合，慰劳甚厚。

既至杭，大旱，饥疫并作。轼请于朝，免本路上供米三之一。明年春，又减价粜常平米，多作饘粥药剂，遣使挟医分坊治病，活者甚众。杭本近海，地泉咸苦，居民稀少。唐刺史李泌始引西湖水作六井，民足于水。白居易又浚西湖水入漕河，自河入田，所溉至千顷，民以殷富。湖水多葑，自唐及钱氏，岁辄浚治，宋兴，废之，葑积为田，水无几矣。漕河失利，取给江潮，舟行市中。潮又多淤，三年一淘，为民大患，六井亦几于废。轼见茅山一河专受江潮，盐桥一河专受湖水，遂浚二河以通漕。复造堰闸，以为湖水畜泄之限，江潮不复入市。以余力复完六井，又取葑田积湖中，南北径三十里，为长堤以通行者。堤成，植芙蓉、杨柳其上，望之如画图，杭人名为“苏公堤”。

(选自《宋史•苏轼传》有删节)

有两种金属的合金13g，与足量稀硫酸反应后，在标准状况下产生气体11.2L，则组成该合金的金属可能是（    ）

将一定质量的 合金投入 稀 溶液中，充分反应。向反应后的溶液中逐滴加入一定物质的量浓度的 溶液，生成沉淀的质量与所加 溶液的体积关系如图所示。下列说法正确的是（   ）

阅读理解

    A beautiful and very successful actress (女演员) was the star for a new musical show. Her home was in the countryside, but she did not want to go back there every night, so she bought an expensive house in the centre of the city, got some beautiful furniture and got a man to paint the rooms in new colours.

    It was very difficult to get tickets for her show, because everybody wanted to see it. So she decided to give the painter two of the best seats. She hoped that this would make him work better for her. He took the tickets without saying anything, and she heard no more about them until the end of the month, when she got the painter's bill (帐单). At the bottom of it were these words: “ Four hours watching Miss Hall sing and dance : 3 pounds,” with this note: “ After 5 p.m. I get 15 shillings (先令) an hour instead of 10 shillings.”

假如你是李华，你的美国朋友Tom来信：由于过多使用手机，学习和生活受到极大影响，现在父母亲禁止使用，非常苦恼。请回信，帮他找些理由说服父母。

要点如下：

1）. 表示同情。

2）. 手机对学生的好处：联系父母与朋友；查阅资料；娱乐放松。

3）. 你的意见。

注意 ： 1）.字数120左右；信的开头已为你写好。

2）. 可根据要点适当增加细节，以使行文连贯。

Dear Tom,

    I'm very sorry to know that you are in trouble now.

……

下列化学用语表示正确的是（   ）

在△ABC中，若 sinA﹣sinAcosC=cosAsinC，则△ABC 的形状是（　　）

选词填空(可变换形式，其中有两项是多余的)

Fill in the blanks with the proper forms of given words.

常温下，向20升真空容器内通入a摩硫化氢和b摩二氧化硫（a和b都是正整数，且a≤5，b≤5）．反应完全后，容器内气体可能达到的最大密度约是（　　）

下列各组中属于同位素关系的是（   ）

在△ABC中，若a=9，b=10，c=12，则△ABC的形状是

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Question: I have been learning English for about 7 years. And I still can't make myself understood in English. However, I love learning English. How can I learn English well? Please help me.

    Answer: Many people have asked me this question. Here I will give you several tips for learning English.

    ●

    First of all, you must want to learn. If you are not interested in learning English, no class will help you and no book will help you. So you have to be honest with yourself. Ask yourself, “Do I really want to learn English?” If you can't answer “yes” to this question, it is better for you to set English aside until you're ready and willing to learn.

    ● Set goals (目标).

    To learn English well, you must set some goals. It will also help you to see your progress. Ask yourself, “What are my goals? What areas would I like to improve?” Think about what your goals are, and review once in a while to see that you are making progress toward your goals.

    ● Practice, practice, and practice.

After you have set your goals, you have a better idea of what you need to practice. Just like the athlete whose goal is the Olympics must train daily, you as a language learner must practice language every day to make progress toward your goal.

A. Want to learn. B. I think it is not easy to learn it well. C. Make friends with some Americans online. D. Reading is a very good way to learn new words. E. The answers are as different as the people asking the question. F. The more you practice, the more progress you will make. G. Having goals will help you remember what areas you want to work on.