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问题 选择题

“赤潮““水华“是指水中某些植物营养元素（如N、P等）含量过高，导致水质恶化．下列物质大量使用不会造成“赤潮““水华“的是（　　）

A．CO（NH2）2

B．Ca（H2PO4）2

C．Na5P3O10

D．NaCl

答案

根据题干可知，含有N、P元素的物质使用不当，都可能引起赤潮现象，分析选项知A、B、C中都有N元素或P元素．

故选D

完形填空

对话填空（共10小题；每小题1分，满分10分）

请认真阅读下面对话，并根据各题所给首字母的提示，在答题卡上标有题号的横线上，写出一个英语单词的完整、正确的形式，使对话通顺。

L =" Lucy  " J = Jim

L : Oh, I’ve just had a (76) t        day today.                                 76．     

J : What (77) h         ?                                                                                       77．     

L : Well, I overslept in the morning. I didn’t hear the                         

(78) a        clock.                                                                 78．     

J : Oh, everyone does that once in a (79) w                                  79．     

L : I was late for class, so I drove a little (80) f       . Guess who saw me?

80．     

J : A policeman? You got a ticket?

L : Yeah. He didn’t care that I was late. Anyway, I got to class,

(81) b        I had brought the wrong book. The teacher wasn’t 81．     

(82) h         .                                                                      82．     

J : That’s really had.

L : What’s (83) w        , I have a paper due tomorrow. It’s on a      83．     

Hard drive (硬盘). I went to the computer lab and I couldn’t

(84) f          my file. I forgot to save the information.           84．     

J : Oh, not!

L : And now I need to go home. And you know (85) w       ?          85．     

My car keys are missing.
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单项选择题

大黄具有的功效是

A．清热泻火，解毒止

B．活血祛瘀，通络止痛

C．泻火凉血，清心除烦

D．利胆退黄，清热除疳

E．泻火解毒，凉血除蒸
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