Steven Jobs, the designer of Apple Computer, was not clever when he was in school. At that time, he was not a good student and he always made troubles with his schoolmates. When he went into college, he didn't change a lot. Then he dropped out（退学）. But he was full of new ideas.
   After he left college, Steven Jobs worked as a video game designer. He worked there for only several months and then he went to India. He hoped that the trip would give him some new ideas and give him a change in life. Steven Jobs lived on a farm in California for a year after he returned from India.
   In 1975, he began to make a new type of computer. He designed the Apple Computer with his friend in his garage (汽车库). He chose the name "Apple" just because it could help him to remember a happy summer he once spent in an apple tree garden. His Apple Computer was such a great success that Steven Jobs soon became famous all over the world.

1922年，美、英、日、中等九国代表在华盛顿签署了关于中国问题的《九国公约》，此条约的最大受害者是（    ）

白细胞____细胞核，比红细胞____，但数量少。当病菌侵入人体内时，能穿过毛细血管，集中到病菌入侵部位，将病菌包围、吞噬。