问题 完形填空
Homework is work, not play. In contrast to what some might hope, students 55 finish their homework exclaiming that they had great fun. Nor is homework an activity that students choose to undertake. It is 56 by a teacher for students to complete on the teacher’s schedule, with the teacher’s requirements in mind. So to have the fight 57 Will be of great help. Homework means business and the student should expect to work on it seriously. As in the work place, careless efforts and lack of self-discipline are likely to make the  58 impression.
Teachers assign homework for  59 purposes. In some cases, teachers seek to review and solidify material being covered in class; homework is also designed to 60 student learning beyond class lessons. As students mature, teachers often assign homework nightly in several subjects. Homework is also used to prepare students to handle new work, 61 in the ease of summer reading. Increasingly, school reforms call for homework to take the form of course projects, thus increasing its 62 to “real-life” job-related activity.
Like jobs, homework can be appealing when its resources are well managed. Resources 63 sources of information—textbooks, of course, and increasingly, the Internet—but they also include a quiet space to work, materials and equipment such as calculators, paper or a computer, and others who cohabit (共面存在) in the homework environment. The external (外部的) resources needed for homework can be viewed as a kind of 64 . office for the child with features like those needed in the workplace.
小题1:
A.sometimesB.often C.mostlyD.rarely
小题2:
A.discovered B.forcedC.assignedD.taught
小题3:
A.amountB.answer C.scheduleD.attitude
小题4:
A.generalB.vivid C.wrong D.vague
小题5:
A.highB.variousC.ordinaryD.temporary
小题6:
A.extendB.describe C.displayD.reward
小题7:
A.asB.whenC.even ifD.now that
小题8:
A.adjustmentB.solutionC.approachD.connection
小题9:
A.indicateB.include C.reserveD.resemble
小题10:
A.homeB.business C.headD.supply
答案

小题1:D

小题2:C

小题3:D

小题4:C

小题5:B

小题6:A

小题7:A

小题8:D

小题9:B

小题10:A

选择题
阅读理解与欣赏

(三)阅读《微 藻——可循环的“绿色油田”》,回答13~16题。(15分)

微 藻——可循环的“绿色油田”

①由于石油资源的逐渐减少乃至最终枯竭,全世界将面临严重的能源危机,因此,世界各国都在积极寻找能够替代石油产品的可再生能源,其中,生物柴油就是一种重要的生物能源。提起生物柴油的原料,我们可能会想到油菜和大豆,用它们“体内”的油脂加工而成的生物柴油,能有效降低碳排放。然而,这两种作物的培育周期较长,占用农田较多,会产生“与人争粮,与粮争地”问题,从而导致“解决了能源危机,却出现粮食危机”的尴尬结果。此时,微藻进入了科学家们的视线。

②微藻是一种古老的低等植物,广泛地分布在海洋、淡水湖泊等水域,种类繁多。微藻可直接利用阳光、二氧化碳和含氮、磷等元素的简单营养物质快速生长,并在细胞内合成大量油脂。因此,微藻为生物柴油生产提供了新的油脂资源。

③与大豆、油菜和麻风树等油料植物相比,微藻的生长周期短,从初生到可以制油仅需一个星期左右,而大豆等油料植物一般需要几个月。此外,微藻的含油量高,油脂产率高,单位面积产油量是大豆的数百倍,每公顷可年产几万升生物柴油。微藻还不会占用耕地,利用滩涂、盐碱地、荒漠等,以及海水、荒漠地区的地下水等,就可以大规模地开发“微藻油田”,不会与农作物争地、争水。

④微藻在培养过程中还可固定大量二氧化碳,因此,利用微藻制造生物柴油能大量减少二氧化碳排放。据计算,每培养1吨微藻,需要消耗约2吨二氧化碳。此外,微藻在培养过程中可利用废水中的氮、磷等营养成分,从而降低水体的富营养化,因此,微藻还能用于净化工厂排放的废水和城市生活污水。

⑤现在,我国已启动了微藻能源方面的首个973项目“微藻能源规模化制备的科学基础”。该项目有望在5年时间内开发出一个“微藻资源库”,提供适合在我国不同地方、不同气候条件下生长的藻株。今后,各地在建设“微藻油田”时,就可在资源库中挑选合适的微藻品种。该项目还将深入研究微藻产品的机理,力争提高微藻产油的效率,降低它的成本。此外,该项目还将通过对光生物反应器、培养工艺、采收、油脂加工及藻细胞综合利用的研究,建立一套中试系统,全面评估微藻产油的技术指标、经济指标和环境指标,大力推动我国微藻能源的产业化进程。

小题1:第②段除了指出微藻是古老的低等植物外,还介绍了微藻哪四个特点? (4分)

小题2:第③段主要运用了哪两种说明方法?有什么好处?    (4分)

小题3:我国“微藻能源规模化制备的科学基础”研究项目,要解决哪些问题?(3分)

小题4:从全文看,为什么说微藻能源是“可循环”的、“绿色”的? (4分)