条件甲：“$a>0$且$b>0$”,条件乙：“方程$\frac{x^2}{a}-\frac{y^2}{b}=1$表示双曲线”，那么甲是乙的（ ）

财政部、国税总局宣布，自2014年1月1日起至2016年12月31日，享减半计征企业所得税优惠的小微企业范围上限由年应纳税所得额6万元扩至10万元。这一优惠政策对小微企业必将产生积极影响，其合理的传导顺序是：（     ）

①生产成本降低  ②扩大再生产  ③企业利润增加  ④税收负担减轻

    If you want to become a fluent English speaker you should take some advice. There are four skills in learning English. They are reading, listening, speaking, and writing. The most important thing you must remember is that if you want to improve your speaking and writing skills, you should first master the skills of reading and listening.

    Read as much as you can. But your reading must be active. It means that you must think about the meaning of the sentence, the meaning of the unfamiliar（不熟悉） words, etc. There is no need for you to pay much attention to grammars or try to understand all the unfamiliar words you come across, but the fact that you see them for the first time and recognize them whenever you see them, for example, in other passages or books, is enough. It would be better to prepare yourself a notebook so you can write down the important words or sentences in it.

    As for listening, there are two choices: besides reading, you can listen every day for about 30 minutes. You can only pay attention to your reading and become skillful at your reading, then you can catch up on your listening. Since you have lots of inputs in your mind, you can easily guess what the speaker is going to say. This never means that you should not practice listening.

    For listening you can listen to cartoons or some movies that are specially made for children. Their languages are easy. Or if you are good at listening you can listen to VOA or BBC programs every day. Again the thing to remember is being active in listening and preferably taking some notes.

    If you follow these pieces of advice, your speaking and writing will improve quickly, and you can be a fluent English speaker one day.

    In the Middle Eastern country of Syria (叙利亚), there are over 4 million refugees (难民). Youssef was 10 years old when a local Syrian musician discovered his talent: a deep, powerful voice. However, Syria's civil (内部的) war took place. He and his family lost their home.

    When the Action for Hope Music School announced that it was looking for talented children to train, his family encouraged him to attend the school. A year and half later, the now 14-year-old, Youssef, with another 11 children, was chosen to take part in a concert.

    Youssef, a shy boy, was a lead singer in the concert. He gave a confident performance of traditional Syrian songs. “We only heard the sound of a mortar ( 迫 击 炮 ). It fell near us. Many buildings fell down. That is all I remember,” said Youssef. “Music makes me forget everything. Music is the most important thing.”

    Basma, director of Action for Hope, said the music school offers strength to the children who suffer (遭受) from the war. They can find a good way to express themselves and stop thinking of themselves as refugees.

    “Art gives strength. It comes from the ability to create,” Basma said. “People who are in difficult conditions need this strength much more than the rich.”