城市垃圾如果处理不当，直接施用于农田，对农业环境的污染与危害主要表现在哪几个方面？
参考答案：
（1）对土壤理化性状产生不良影响
（2）长期施用垃圾将导致农田中重金属含量积累
（3）日益增多的有机合成材料和塑料及其制品，大部分未经回收利用随垃圾进入农业环境
（4）由于城市垃圾大多未经任何无害化处理直接施用于农田，会将大量的细菌类病原菌、病毒和寄生虫卵带入土壤，成为各种疾病的传播源
| Children are a relatively modem invention. Until a few hundred years ago they look like adult, wearing grown-up clothes and grown-up expressions, performing grown-up tasks. Children did not exist because the family as we know it had not evolved. Children today not only exist; they have taken over in no place more than in America, and at no time more than now. It is always Kids Country here. Our civilization is child-centered, child-obsessed. A kid’s body is our physical ideal. In Kids Country we do not permit middle-aged. Thirty is promoted over 50, but 30 knows that soon his time to be overtaken will come. We are the first society in which parents expect to learn from their children. Such a topsy-turvy situation has come to abort at least in part because, unlike the rest of the world, ours is an immigrant society, and for immigrants the only hope is in the kids. In the Old Country, that is, Europe, hope was in the father, and how much wealth he could accumulate and pass along to his children. In the growth pattern of America and its ever- expanding frontier, the young man was ever advised to GO WEST; the father was ever inheriting from his son. Kids Country may be the inevitable result. Kids Country is not at all bad. America is the greatest country in the world to grow up in because it is Kids Country. We not only wear kids clothes and eat kids food; we dream kids dreams and make them come tree. It was, after all, a boys’ game to go to the moon. If in the old days children did not exist, it seems equally true today that adults, as a class, have begun to disappear, condemning all of us to remain boys and girls forever, jogging and doing push-ups against eternity. |
Going to the moon is an example of ______ .
A．America’s dreams and creativity
B．America’s childish and queer behavior
C．why America hasn’t grown up
D．why America is considered as the greatest country in the world