单项选择题12、It is___that tells the birds when to begin their migration. (2.5分)○ time○ ma
The red rose asked the pine tree what the birds were doing. The pine tree explained that the birds were getting water from the cactus.“The cactus has water” asked the rose.“Yes, you can also drink some from it. The birds can bring water to you if you ask the cactus for help.”...
It is a word usually used to talk about certain animals such as birds,fish and so on.When animals migrate,they travel a long way from one part of the world to another according to the season.For example,swallows (燕子) migrate south in winter.Many animals migrate--th...
Do caterpillars live in the taiga biome? When did insects and arachnids diverge? What happens inside a moth cocoon? What is the purpose of butterflies? What do monarch butterflies eat during migration? What happens inside a butterfly chrysalis?
What do Least sandpipers eat? Tiny crustaceans, insects, snails. Diet varies with season and place. On breeding grounds, may feed mostly on larvae of various flies. During migration on coast, may feed mostly on small crustaceans called amphipods and isopods; in inland areas, may eat mostly...
Do you know other migrations? 相关知识点: 试题来源: 解析 Yes, I know about the migration of birds. Every year, many species of birds migrate from their breeding grounds to their wintering grounds, and then back again. This migration can cover thousands of kilometers and is triggered by...
As we observed that birds did not appear to disperse until a minimum of 40 days after fledging this allowed us to use a 30 day smoother and still detect the point of emigration. The main requirement for this method is to distinguish between parental influence (our predicted home ranges) and...
Every year some birds fly south when days turn cold and leaves from trees start to fall. They travel a very long way to find a warm winter. This travel is called migration (迁徙). Birds do that because in winter most of the plants die and some insects (昆虫) hide. The fly away to...
When she was a child, what she liked to do most was to watch the blue sky and enjoy birds flying freely in the sky. She always ___ that some day she could also fly like a bird.When Jenny was in the fourth grade, her teacher asked them to write a passage about their ___. In ...
This k___3___ of travel is called migration ( 迁徙 ). Birds are animals that like to migrate a lot when it is cold. About 600 out of 9 000 kinds of birds do it. They leave in a___4___ and come back during the w___5___ spring months. Many b___6___ don’t like th...