2013年3月以来，在上海等地区发生了由H7N9型禽流感病毒引起的传染病．有关专家建议普通人预防禽流感应做到：

①注个人卫生，保持勤洗手、室内勤通风换气、注意营养，保证充足的睡眠和休息，加强体育锻炼．尤其在接触禽畜后及时彻底洗手．

②尽可能减少与禽畜不必要的接触，特别注意尽量避免接触病死禽畜．食用禽肉蛋时要充分煮熟．

③生熟食物要分开处理，当手部有伤口，处理肉类时建议佩戴手套等．

（1）已知分式$\frac{2x^2-8}{x-2}$，x取什么值时，分式的值为零？

（2）x为何值时，分式$\frac{x^2+2}{3x-9}$的值为正数？

根据短文，选择正确答案。

     An old tiger lives in the forest. He does not want to look for food now. He often tells other animals to bring him something to eat.

     He see a monkey and says, “I am hungry, Monkey. Go to the village and bring me a fat pig.”

  “Oh, Tiger,” says the monkey. “I cannot do that now. There is another tiger over there. He also wants a fat pig. He will not let me get anything for you to eat. I am afraid of him.”

   “What?” cries the old tiger?“Show me that tiger. I will talk to him.”

    “Come with me,” says the monkey.

     The monkey and the tiger get to a bridge over the river.

   “Now look down at the river,”says the monkey.

   “Do you see the head, the white teeth and the large green eyes of a tiger?”

   “Yes, I do.” Cries the old tiger, “I will eat him up”

     With these words, the tiger jumps into the water.

要发挥集体的力量，必须做到（    ）
①要有共同的目标 ②要有相同的个人理想 
③要有共同的行动  ④要有共同的特长 

要求：1）应包含以上全部的信息，可适当增加细节，以使条理清楚、行文连贯；

2）词数：80字左右

3）短文中不得出现你的真实姓名、学校名和地名。