If you don’t want to talk to him, I’ll speak to him（ ） .
A.on your behalf B.on your account C.for your part D.in your interest
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1.The author mentions all the following natural phenomena that help animals navigate EXCEPT （）.2.What makes it necessary for a bird to rely on a magnetic compass when navigating?3.According to the passage what information does the dance of the scout bee communicate to the other worker bees?4.What enables the bees to fly by the sun even though the sun’s position is not fixed?
'>Researchers have found that migrating animals use a variety of inner compasses to help them navigate. Some direct themselves by the position of the sun. Others navigate by the stars. Some use the sun as their guide during the day, and then switch tn star navigation by night. One study shows that the homing pigeon uses the Earth's magnetic fields as a guide in finding its way home, and there are indications that various other animals, from insects to mollusks, can also make use of magnetic compasses. It is of course very useful for a migrating bird to be able to switch to a magnetic compass when clouds cover the sun; otherwise it would just have to land and wait for the sun to come out again.Even with the sun or stars to guide by, the problems of navigation are more complicated than they might seem at first. For example, a worker honeybee that has found a rich source of nectar and pollen flies rapidly home to report. A scientist has discovered that the bee sent out to look for food delivers her report through a complicated dance to the other workers not only how far away the food is, but also what direction to fly in relation to the sun. But the sun does not stay in one place all day. As the workers start out to gather the toed, the sun may already have changed its position in the sky somewhat. In later trips during the day, the sun will seem to move farther and farther toward the west. Yet the worker bee seem to have no trouble at all in finding the food source. Their inner clocks tell them just where the sun will be, and they change their course correspondingly.
1.The author mentions all the following natural phenomena that help animals navigate EXCEPT （）.2.What makes it necessary for a bird to rely on a magnetic compass when navigating?3.According to the passage what information does the dance of the scout bee communicate to the other worker bees?4.What enables the bees to fly by the sun even though the sun’s position is not fixed?
A.the sun B.the stars C.magnetic fields D.wind direction问题2： A.The possibility of bad weather B.The constant motion of the sun. C.Its patterns of migration. D.Its need to constantly change homes.问题3： A.The time of the day. B.What the weather is like. C.How far away the food is. D.Which flowers the scout has found.问题4： A.They are equipped with biol