下列不属于动物繁殖行为的是（    ）

抄写生字并组词。

郑强说：“小时候，看见蝙蝠夜间活动，我感到很惊奇，后来通过上自然课，知道蝙蝠虽然视力很差，但它有专门的器官，能发射和感受频率很高的声音，蝙蝠发出的声音的频率高达120000赫兹。”这一事例说明（    ）

①学习，打开了生命的视窗，让我们面前的世界变得更广阔、更精彩   ②学习，改变了思维方式和行为，提升我们的能力和智慧

③我们掌握的所有知识，都是从学校里学到的                                           ④自然课最重要，他可以使我们知道一切问题

    Showing your feeling is important. It is a mistake not to talk to anyone1you're feeling sad, worried or nervous. If you keep bad feelings inside, it can even make you2.

    But if you  3 with someone，like your mom or dad or your best friend，you'll usually begin to feel 4 than before. Now you're not all alone with your problems or worries. 5，it doesn't mean your problems and worries will disappear magically(神奇地）.But at 6，someone else understands what's 7 with you and can help 8 find ways to solve your problems.

    Your mom and dad want to know if you have any 9.They love you and they want to know what's happening in your life. But if you don't want to talk with them，what should you do? Find a trustworthy(可信的)friend or teacher at school or a relative. Maybe that person can help you deal with your problems. Then you'll feel as 10as before.