摘要: 7. 8. 9. 10. (2) Bats are the only flying “animals in the world. It is known to all that they cannot see very well. “As b (1) as a bat is often h (2). Yet, they have no trouble flying on the d (3) nights and finding their way r (4) very well. Why can bats fly and see at night? They fly by “radar . The bat's radar w (5) the same way as the radar on ships and planes. As a bat flies t (6) the air, it makes a sound. If the sounds hit t (7), they will come back and the bat's e (8) will receive the message. In this way, the bat is a (9) to know where the things are. Bats go out for f (10) at night. In the daytime, they hang in some dark places.

网址:http://m.1010jiajiao.com/timu3_id_2409478[举报]

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网