. Book3 Unit4 Period 5

学习目标：完成语篇理解,并且.熟记和使用本节知识点,能拓展所列相关短语

自主合作探究：

I.语篇理解 阅读P30－31课文，选取最佳答案

1．The passage is mainly about________.

　A．an introduction of the moon B．the gravity that I felt on my way to the moon C．my visit to the moon

2．From the text，we know that the force of the gravity would change ______times.

　A．2　　　　　B．3　　　　　C．4

3．If a baby is growing on the moon，when he grows up，he will grow ____than he is on the earth.

　A．taller B．shorter C．fatter

II.要点讲练

1．pull n．C]& vt.拉(力)；拖；牵引力

As the rocket rose into the air，we were pushed back into our seats because we were trying to escape the pull of the earth's gravity.(P30)随着火箭升空，由于我们在努力挣脱地球的引力，我们被向后推在座位上。

归纳拓展：：

pull down摧毁；推翻；拆除 pull in进站停靠；驶向路边(或某处)停靠

pull out离站；(使)摆脱困境 pull through恢复健康；渡过危机

pull up停车；停住

小试牛刀：① The doctor is sure that he will .

医生确信他将恢复健康。

　　　　　② The train half an hour ago. 火车半小时前就进站了。

2．But when I tried to step forward，I found I was carried twice_as_far_as on the earth and fell over.(P31)而当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。

twice as far as...意为"是......的两倍远"，属倍数表达法句型之一。

归纳拓展： 倍数的表达

①倍数＋as＋adj./adv.原级＋as...是......的多少倍......

②主语＋谓语＋...times＋the size(或amount，length...)＋of＋被比较的内容（用于尺寸