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问题 单项选择题

某城市拟建一城市污水二级处理厂，该城市所有工厂排出的工业废水其性质与城市污水性质类似，为解决工业污水问题提出了四个方案，指出其中( )方案最经济合理。

A．废水不经处理直接排放到附近环境容量有限的水体
B．各工厂采用稀释办法，使工业废水的浓度达到排放标准后排入城市下水道
C．工业废水经各工厂自建的处理厂处理达标后排入城市下水道
D．各工厂承担一定的污染治理费用，工业废水排人城市下水道由城市污水厂统一处理

答案

参考答案：D

解析：[试题解析] 由于环境容量和环境的净化能力都属于稀缺性资源，因而使用它们的经济活动的当事人就需向这些资源的所有者支付使用者成本。
工厂交纳一定排污费可以促使经济资源的分配较制定统一排污限制标准更有效率， 同时鼓励各工厂提高生产技术，减少污染，这是经济学所着重求取的最优污染水平而非消除污染。

填空题

Good afternoon, everybody. I’m pleased to be here with you, graduates of 2007. I’m a (1) , and students often approach me with (2) . You see, we are living in a society of great changes. With the presence of (3) , the process of getting a job in today’s world has changed for (4) .
Well, how can you use new technologies to help you First, let’s look at how you (5) . The traditional method of hunting for a job in the past required first, doing research on jobs that were (6) , typically by looking in newspapers, periodicals and magazines, as well as TV ads, and (7) . Then you decided where and for what post you were going to apply, put your resume (8) in a stamped envelope, and waited anxiously for someone to (9) .
Well, today, maybe the job search and (10) are very much the same, but the tools used are much more advanced, and they (11) . In fact, technology has not so much changed the process as enhanced it. The benefit, both for (12) , is that this makes the search more open to people of (13) from all over the world. But as more people are involved, it becomes (14) for the applicant than it ever was before.
The (15) for the working world today is learning these new and (16) and combining them with the older methods people have been using for years. For example, (17) , you can research employment not just in your city, but also in your state, your country, and (18) . You can copy information from a web page and paste it into a Microsoft Word document that’s easy to (19) . In many ways, it’s easier now: Just type your job application, click, and (20) ; it gets there in an instant.
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单项选择题

下列各项中错误的是（）。

A.嗅区覆以假层柱状纤毛上皮

B.嗅觉部分位上鼻甲和鼻中隔间的区域

C.鼻额管开口于半月裂漏斗蜂房

D.上鼻道有后组筛窦及蝶窦的开口

E.窦口鼻道复合体一般在中鼻道
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