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A．How birds learn to build nests.
B．Why birds lay eggs.
C．How bird's nests have evolved.
D．Why some bird's nests are considered primitive.
答案
更多“A．How birds learn to build nests.B．Why birds lay eggs.C．How bird's nests have evolved.”相关的问题
第1题
听力原文： Many egglaying animals merely lay their eggs and leave. With turtles for instance, the eggs hatch on their own. The current theory about birds is that the earliest birds did just that, when they were coldblooded creatures living in warm places. However when they became warmblooded creatures living in cold places they had to remain on top of the eggs to keep them warm. This process we call incubation. For this they needed a place, a nest very likely the first nests were just primitive depressions scraped into the ground. Even now many species still lay eggs in this sort of crude nest. In fact, every spring a mother killdeer lays her eggs in scene pebbles along the edged the parking lot just outside this building. Primitive nests on the ground were fine for some birds but others began to elevate their nests onto Branches, perhaps to avoid predators. These early elevated nests were probably loose platforms of sticks and twigs, the types still built by ospreys and mostarians today. The latest evolutionary development in nests the most re cent version, so to speak, is the cupshaped nest. This is the one we regard today as the typical bird's nest, you know, like a robin's nest.
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A．How birds' nests have evolved.
B．Why some birds' nests am considered primitive.
C．How birds learn to build nests.
D．Why birds lay eggs.
第2题
A．How private languages are developed.
B．How different languages are related.
C．How people create their languages.
D．How children learn to use language.
第3题
The best title for this passage would be ______.
A．How Babies Learn to Speak
B．Early Forms of Language
C．A Huge Task for Children
D．Noise Making and Language Learning
第4题
What's the passage mainly about？
A．How to learn foreign languages easily.
B．How to apply for studying in France.
C．How to prepare for an independent study.
D．How to ensure an enjoyable study overseas.
第5题
What can a listener expect to learn from the talk？
A．How to get along better with people by improving listening skills.
B．How to be more active in talking with other people.
C．How to understand a foreign language.
第6题
What can we learn from Get Rich Slowly？
A．How to solve equations.
B．How to spend less money.
C．How to earn more money.
D．How to turn a hobby into a business.
第7题
The best title for this passage would be______.
A．How Babies Learn to Speak
B．Early Forms of Language
C．A Huge Task for Children
D．Noise Making and Language Learning
第8题
A.A.how
B.B.that
C.C.which
D.D.what
第10题
A.A.how
B.B.that
C.C.which
D.D.what
