Did you watch the magic shows played by Liu Qian from Taiwan in the 2009 CCTV Spring Festival Gala（春节联欢会）? They attracted great attention and wide interests of the audience(观众) . During the gala, Liu mangaged to drop a coin into a glass which was placed upside down (倒置) and transferred a finger ring into an egg. The two magic shows were so successful that everyone is now mad about him and all want to know how to play magic tricks. “I saw the surprise on everyone’s face. It was cool, ”Liu said.

However, you may not believe that Liu didn’t go to any magic school. He just learned by himself. When Liu was seven, he saw a coin trick in a big store. At that moment Liu decided to learn magic. He worked hard at it. He practiced hard to improve his skills. Then one day he was able to put on a show for his class.

After years of hard work, now Liu is a great magician. But he isn’t satisfied with what he has got and keeps on trying every day. He may spend three years working out a new show.

小题1: Liu Qian becomes famous______.

A．because he is from Taiwan

B．for his magic shows.

C．only in Taiwan

D．when he was seven.小题2:According to the passage, we can use the following words to describe Liu Qian  EXCEPT______.

A．creative

B．hardworking

C．satisfied

D．wise.小题3: What does the underlined word “transferred”mean?

A．制作

B．进入

C．输入

D．转移

在薄荷香型牙膏中含有抗牙腐蚀的药物，其化学式为Na₂FPO₃，已知F为-1价，其核电荷数为9．

（1）该药物中磷的化合价为______；

（2）已知相对原子质量：Na为23，P为31，O为16．Na₂FPO₃的相对分子质量为144，则F原子核内有______个中子．