There are many stories about bats （蝙蝠）.People in Europe once feared bats.They feared them maybe because they looked scary.Or maybe it was because they only came out at night.But people in Persia and China weren't afraid of bats.To them，bats meant good luck，long life and happiness.
    People used to think that bats were birds.Today we know that bats are mammals （哺乳動物）.They are the only mammals that fly.Like all mammals，bats are warm-blooded.They feed their babies milk.Bats live all over the world，except where it is very cold.Most bats live near the equator （赤道）.
    There are over 900 kinds of bats.Both the largest and the smallest bats live in Asia.The largest bat is the flying fox.It weighs about two pounds.The smallest bat weighs less than 2 g.Most bats are just big enough to fit into your hand.
    Most bats eat jye.aisects.In fact，they eat millions of insects a year.This makes them very helpful to humans.Some bats eat fish，birds，frogs and small mammals.Some eat fruit and drink nectar （花蜜）.These bats often carry their food to their homes.Along the way they drop seeds.This helps spread plants to new areas.
    The vampire bat （吸血蝠） is perhaps the most famous bat，but it doesn't attack （攻擊） people.It drinks the blood of some animals.This bat is found only in Mexico and Central and South America.
（1）What did bats mean to people in Persia？

Good luck，long life and happiness.

Good luck，long life and happiness.

（2）Where do most bats live？

Near the equator.

Near the equator.

（3）How much does the largest bat weigh？

About two pounds.

About two pounds.

（4）Why are bats helpful to humans？

Because they eat millions of insects a year.

Because they eat millions of insects a year.

（5）What does the vampire bat feed on？

The blood of some animals.

The blood of some animals.