第33题: [单项选择]若要对某一工厂污染状况进行监测,已知该地区常年或季节风玫瑰图,最为合适的布点方式为() A. 四周布点 B. 扇形布点 C. 捕捉烟波布点 D. 几何状布点 E. 沿道路布点 参考答案:B 答案解析:该工厂属于点源污染。进行监测时,一般以污染源为中心,在其周围不同方位和不同距离的地点设置采样点,可采用四周布点、扇形布点或捕捉烟波布点。但在已知该地区常年或季节风玫瑰图的情况下,扇形布点最为合适。
A. he overheard their conversation B. he had received a lot of complaints for lack of post-office boxes C. he was thankful for the letter the author had written D. he was proud of their good service 参考答案:C 答案解析:从文章最后两句可以看出答案为C。