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【备考必备】托福官方真题Official5阅读长难句资料汇总

2016年01月18日11:47 来源:互联网
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摘要:托福官方真题Official是考生备考托福最常用的资料,对于一些托福阅读考试中常见的长难句,也是困扰考生最大的问题。那么这些长难句应该如何去应对呢?这里为大家整理了官方真题Official阅读长难句的汇总,希望对大家的托福阅读长难句备考有帮助。

在这里小编为大家带来托福官方真题Official5阅读长难句,希望对大家提高托福阅读水平有所帮助!

【备考必备】托福官方真题Official5阅读长难句资料汇总图1


托福官方真题Official5阅读长难句官方真题Official5: Minerals and Plants

1. Mineral deficiencies can often be detected by specific symptoms such as chlorosis (loss of chlorophyll resulting in yellow or white leaf tissue), necrosis (isolated dead patches), anthocyanin formation (development of deep red pigmentation of leaves or stem), stunted growth, and development of woody tissue in an herbaceous plant.

2. Only recently have investigators considered using these plants to clean up soil and waste sites that have been contaminated by toxic levels of heavy metals–an environmentally friendly approach known as phytoremediation.

3. For examples, in field trials, the plant alpine pennycress removed zinc and cadmium from soils near a zinc smelter, and Indian mustard, native to Pakistan and India, has been effective in reducing levels of selenium salts by 50 percent in contaminated soils.

官方真题Official5: The Origin of the Pacific Island People

1. Contrary to these theorists, the overwhelming evidence of physical anthropology, linguistics, and archaeology shows that the Pacific islanders came from Southeast Asia and were skilled enough as navigators to sail against the prevailing winds and currents.

2. The basic cultural requirements for the successful colonization of the Pacific islands include the appropriate boat-building, sailing, and navigation skills to get to the islands in the first place, domesticated plants and gardening skills suited to often marginal conditions, and a varied inventory of fishing implements and techniques.

3. Contrary to the arguments of some that much of the pacific was settled by Polynesiansaccidentally marooned after being lost and adrift, it seems reasonable that this feat was accomplished by deliberate colonization expeditions that set out fully stocked with food and domesticated plants and animals.

4. As Patrick Kirch, an American anthropologist, points out, rather than being brought by rafting South Americans, sweet potatoes might just have easily been brought back by returning Polynesian navigators who could have reached the west coast of South America.

【备考必备】托福官方真题Official5阅读长难句资料汇总图2

托福官方真题Official5阅读长难句官方真题Official5: The Cambrian Explosion

1. The geologic timescale is marked by significant geologic and biological events, including the origin of Earth about 4.6 billion years ago, the origin of life about 3.5 billion years ago, the origin of eukaryotic life-forms (living things that have cells with true nuclei)  about 1.5 billion years ago, and the origin of animals about 0.6 billion years ago.

2. At one time, the animals present in these fossil beds were assigned to various modern  animal groups, but most paleontologists now agree that all Tommotian fossils represent unique body forms that arose in the early Cambrian period and disappeared before theend of the period, leaving no descendants in modern animal groups.

3. These fossil beds provide evidence of about 32 modern animal groups, plus about 20 other animal body forms that are so different from any modern animals that they cannot be assigned to any one of the modern groups.

以上就是小编为大家整理的官方真题Official5阅读长难句,希望对大家托福阅读备考有帮助。最后小编预祝大家托福考试能取得理想的成绩。

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