1972年2月，美国总统尼克松发表关于中美关系的演说：“我们必须做的事情是寻求某种办法——我们能够有分歧而不至于成为战争中的敌人。”由此可见，中美关系（    ）

布达拉宫位于下列哪个城市（　　）

    What do you usually do at the weekend? Some people like to 1 at home. But others like to go 2 a walk or play football. My friend Jack works hard in a factory on weekdays. At the weekend, he always 3 the same thing. On Saturday he 4 his car and on 5 he goes with his family to a village by car. His uncle and aunt have a farm there. It isn't a 6 one, but there's always 7 work to do on a farm. In 8, the harvest season, the children help them pick oranges. They also help with the animals and give them their 9. Jack and his wife help in the fields. At the end of the day, they are all 10 and Jack's aunt gives them a big meal.

如果a与－3的和是0，那么a是（   ）

读某地等温线图，回答下列各题。