关注:2017年10月15日托福阅读机经预测

>>托福机经预测：关注:2017年10月15日托福阅读机经预测

>>托福考试特色辅导课程

生物类

Dinosaurs and Parental Care

对应题目：

1. The word “alleged” in the passage is closet in meaning to

 A.scattered

 B.supposed

 C.isolated

 D.exposed

2. Paragraph 1 answers which of the following questions about parental care in dinosaurs?

 A.Which type of parental care was more important for the survival of dinosaur young,prehatching care or posthatching care?

 B.Why were dinosaur remains in eastern Montana preserved rather than destroyed over time?

 C.Did Maiasaura hadrosaurs provide types of parental care not provided by other dinosaurs?

 D.What evidence supports the view that Maiasaura females laid their eggs in nests?

Paragraph 1

Habitat Selection

From fossil evidence alone the question of whether or not dinosaurs cared for their young is very difficult to answer. Because behaviors are not preserved in the fossil record, we can only make inferences from indirect evidence. Parental care can be divided into two types of behavior: prehatching (building nests and incubating eggs—for example, sitting on top of them so as to warm the eggs and encourage hatching) and posthatching (feeding the young and guarding the nests). Most of our evidence comes from alleged dinosaur rookeries (places where nests are built). Several have been excavated in eastern Montana, where a large concentration of dinosaur nests was found at a place now called Egg Mountain. Most of these probably belonged to the hadrosaur Maiasaura. Preserved in these nests are the bones of baby dinosaurs. The finds at Egg Mountain and other sites around the world document that dinosaurs laid their eggs in nests.

Paragraph 2

The nests at Egg Mountain are reported to be equally spaced, separated by a space corresponding to the length of an adult Maiasaura. From this arrangement scientists have inferred that the nests were separated in this way to allow incubation in a tightly packed nesting colony. Although this interpretation is open to challenge, the discovery of Oviraplor adults on top of Oviraplor egg clutches (as determined by embryos in some eggs), is relatively powerful evidence that at least these dinosaurs incubated their nests.

Temperature Regulation in Marine Organisms

Cell Theory

Poikilotherms

Forest Succession

The Role of Diapause

The Identification of the Genetic Material

How Plants and Animals Arrived in the Hawaiian Islands

Extinctions at the End of the Cretaceous

The Cambrian Explosion

The Extinction of the Dinosaurs

How Animals in Rain Forests Make Themselves Heard

Sociality in Animals

Constraints on Natural Selection

天文类Surface Fluids on Venus and Earth

Origin of the Solar System

Comets

文化艺术类

The Origins of Writing

Live Performance

The Origins of Theater

The Development of Printing

地质类

Early Theories of Continental Drift

Attempts at Determining Earth’s Age

How Soil is Formed

Earth’s Energy Cycle

Thermal Stratification

环境类

The Climate of Japan

The Role of the Ocean in Controlling Climate

经济类

Effects of the Commercial Revolution

Seventeenth-Century European Economic Growth

考古类

Environmental Impact of the Anasazi

The Collapse of the Mays

The Chaco Phenomenon

科学类

The Birth of Photography

Early American Printing Industry

农业类

Agricultural Society in Eighteenth- Century British America

Water Management in Early Agriculture

社会类

Population Growth in Nineteenth-Century Europe

Hunting and the Setting of Inner Eurasia

如需了解更多关于托福考试的内容，请进入坦途网托福考试频道，精彩内容正在更新。