下列哪种结构不属于海星水管系统（）A.环水管 B.间辐管 C.石管 D.波氏囊

第二节：短文改错（共10小题，每题1.5分，满分15分）

There was no easily way in language learning.     71._______

A good memory（记性）is a great help, and it is       72._______ _

not only to remember rules from a grammar              73. _______

book. There is no much use learning by heart      74. _______ _

many words, study the dictionary and so on               75. _______ _

“Learn through practice”—this is a good           76. _______ _

advice for those learning new language .             77. _______ _

To make great progresses in a language              78. _______ _

learning, we must learn the language by                 79._______ _

speaking and writing as many as we can .            80. _______ _

材料一：广东汕头贵屿镇是中国的电子垃圾产业中心。当地农民工使用最原始方法处理电子垃圾，数以百计的河流因含有重金属物质而呈现漆黑色；镇区外，那些被抛弃的田地变成了各式各样的垃圾堆放点，经常冒出遮天蔽日的滚滚黑烟；当地70.8%的儿童的血铅水平处于铅中毒的程度。

材料二：下图为海淀区"电子环保·循环经济"示范工程流程图。

（1）根据材料说明电子垃圾造成的危害。

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（2）海淀区"电子环保·循环经济"示范工程体现了循环经济的哪些原则？

___________________________________________________________________________________________

（3）借鉴海淀区"电子环保·循环经济"生产流程，绘制城市生活垃圾的循环利用流程图。

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（4）环境管理的手段除了技术手段、经济手段、环境教育和新闻媒介手段外，还可以采取______手段、______手段等。

我国新型专利权和外观设计专利权法定的保护期限为()。

A.5年

B.10年

C.15年

D.20年

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

The rising of the rate of tardiness among MegaTech employees has generated concern among management that the employees are not sufficiently focused on increasing shareholder value.（）

A. The rising of the rate

B. Rising rates

C. The rising rate

D. Because of the rising rate

E. Because the rising rate

喹诺酮类药物的作用机制是（）。

A.二氢叶酸合成酶抑制剂

B.二氢叶酸还原酶抑制剂

C.DNA拓扑异构酶Ⅱ抑制剂

D.抑制花生四烯酸环氧合酶