Unit 1 How tall are you 扩展资料

Unit 1 How tall are you 扩展资料,标签：一年级下册英语教案,小学英语教案,http://www.67xuexi.com
5米多高处，吞下挂在那里的一条大鱼；“速游中纵跳”：先沿着池边快速游泳，破浪疾驶，时而跃出水面；“召之即来”：听到召唤信号，立即游过来；“猫捉老鼠”：虎鲸腹部朝上，两只胸鳍露出水面，驯养员坐在它的胸部，一只手握着它的牙齿，随虎鲸在水中兜上几圈之后，便跳进水中，这时，虎鲸从背后追上，再次把他驮在背上，并且多次重复着这个动作……。其实，虎鲸变得这样温顺是因为人们掌握了它的一个弱点：一旦离开了同类而单独生活时，胆量就变得很小了。当然，在精彩的表演之后，蛙鱼、金枪鱼等美味佳肴作为奖赏也是必不可少的。

由于虎鲸智力出众，也被人们通过驯化来完成一些特殊的任务，例如美国海军夏威夷水下作战中心，每年要花费数百万美元来训练一只动物部队，虎鲸就是其中的主要成员之一，可以进行深潜、导航、排雷等工作。人们还训练虎鲸打捞海底遗物，播放虎鲸的声音吓跑海水中的害兽，或者把它当成海中警犬，看护和管理人工养殖的鱼群等。

虎鲸全年都可以交配，雌兽每3-5年生育一次，怀孕期为1年，每胎产1仔，哺乳期也需要1年左右，寿命约为20一35岁。在出生后的1-2年内，幼仔在饥饿或者呼唤雌兽时，只能发出粗厉的声音。以后随着年龄的增长逐渐模仿成体的声音，改进和丰富自己的叫声，但由于虎鲸的语言复杂而多变，幼仔要完全掌握成体的“语言”，至少需要花上5年多的时间。

虎鲸在分类学上隶属于哺乳纲、鲸目、领航鲸科、虎鲸属。领航鲸科动物与海豚的亲缘关系较近，也可以看作是体型较大的海豚，其共同特点是嘴小，没有喙，上下颌均具有尖锐而发达的圆锥状牙齿，但数目比较少，上、下颌的每侧都少于15枚，而且不同的种类牙齿的数目也不相同，最少的仅有1枚。头骨的左右不对称，外鼻孔仅有1个。鳍肢上具有5趾。胸骨大。没有锁骨。没有盲肠。它们体型的大小也差异很大，最小的在1米左右，最大的达20米。

About height and age

You often hear people ask such questions as, “ How tall are you?” and “ How old are you?” “ How tall are you?” is a question about people’s height. But “ How old are you?” is about people’s age.

“ How tall are you?” is a simple question, and there is usually a simple answer, “ Sixteen years old,”, “ Twelve years old,” etc.

But if someone is described as young or middle-aged or old, then how old is that person? It is difficult to know because these are words that have different meanings for different people.

At what age does someone become an adult? In some countries, it is when the government says a person is old enough to vote.

There is a saying that old age is always ten years older than yourself. If you are fifteen, then you think that someone 25 is old. If you are seventy, then you probably think someone 80 is old.

                                                  选自：《剑桥少儿英语》第三级下册 (2001年出版)

Listen look and say

--- How tall are you, Bob?

--- I don’t know.

--- Let’s see. Oh, you’re 158 centimetres tall.

--- What about you, Ben?

--- I’m 165 centimetres tall.

--- You’re 7 centimetres taller than I.

--- Yes, but you’re still growing. Don’t worry!

You’ll catch up with me soon.

--- I hope so.

>>《Unit 1 How tall are you 扩展资料》这篇教育教学文章来自［www.67xuexi.com网］www.67xuexi.com 收集与整理，感谢原作者。

                                                  选自：《剑桥少儿英语》第三级下册 (2001年出版)

Let’s chant: How tall are you?

How tall are you? How tall are you?

I’m one hundred and forty-eight centimetres tall.

How tall are you? How tall are you?

I’m one hundred and sixty centimetres tall.

How tall is she? How tall is she?

She’s one hundred and sixty-five centimetres tall.

How tall is he? How tall is he?

He’s one hundred and seventy centimetres tall.

                                                   选自：《剑桥少儿英语》第三级下册 (2001年出版)

>>《Unit 1 How tall are you 扩展资料》这篇教育教学文章来自［www.67xuexi.com网］www.67xuexi.com 收集与整理，感谢原作者。

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