问题
填空题
某校研究性学习小组对福州某段内河水质的状况进行相关的调查研究。
（1）图8所示的自制净水器中的__________物质，可除去水中的异味和色素。
（2）硬水会给生活和生产带来许多麻烦，长期饮用硬水可能会引起体内结石；如用硬水洗涤衣物，既浪费肥皂又洗不干净，时间长了还会使衣物变硬。通过化学学习，我们知道可用__________来区分该内河的水属于硬水还是软水；生活中要降低水的硬度，可采用的方法是____________。
（3）你认为下列行为会造成内河水质下降的是_________。（填标号）
A．在河边种植花草树木 B．居民将生活污水直接排入内河
C．将垃圾倒入内河中 D. 定时定期进行水质监测
（4）请针对现阶段的水污染提2条建议_________________ ；____________________.
答案
（1）活性炭
（2）肥皂水；加热煮沸
（3）B；C
（4）加大防治水污染立法制度建设；工业污水处理达标后排放；生活污水集中处理达标后排放；农业合理施用化肥、农药；严禁随意到处倾倒生活垃圾；清除沿河两岸养猪场(或养鸡、养鸭场)等等。（其它合理答案均可）
But history has a way of uncovering its secrets. On Nov. 5, this year, three members of a family from Finland arrived at Halifax and laid fresh flowers at the grave. “This is our baby,” says Magda Schleifer, 68, a banker. She grew up hearing stories about a great-aunt named Maria Panula,42, who had sailed on the
including a 13-month-old boy named Eino from who
m she had become separated during the final minutes of the crossing. "We thought they were all lost in the sea," says Schleifer.
im for 90 years."
from People, November 25, 2002