张大妈播下花生种子后，连续几天降雨导致水浸田，造成出芽率低，原因主要是（  ）      

杠杆的五要素

  (1)     ____  ：使杠杆绕着转动的固定点。

  (2)   ____    ：使杠杆转动的力。

  (3)   ____    ：阻碍杠杆转动的力。

  (4)动力臂：从  ____     到  ____     的垂直距离。

  (5)阻力臂：从  ____     到   ____    的垂直距离。

    A group of frogs were traveling through the forest, but unluckily two of ____fell into a hole. The other frogs tried to help them. When they saw how____ the hole was, they cried to the two frogs that they could not be saved. The two frogs didn't care and tried their____to jump up out of the hole. The other frogs kept saying that they were sure to die. Finally, one of the two frogs heard____the other frogs were saying and gave up. Then he fell ____and died.

    However, the other frog continued to jump as hard as he could____last, he made it out. When he got out, the other frogs asked, "Did you hear us?" The frog, who had a____hearing, explained, "I thought you were encouraging me ____ the time."

    The story teaches us a ____ There is power of life and death in the tongue(言语）.An encouraging word to those who are down can help them out ____a discouraging word can kill them.