高二英語教案：《Unit 2 Cloning. 克隆》教學(xué)設(shè)計（二）(4)

　　T: Because nothing really prepared the world for the 1997 announcement that a group of Scottish scientists had created a cloned sheep named Dolly. Many folks believe that within the next decade, we will hear a more shocking announcement of the first cloned human. Scientists in South Korea have already created human embryonic stem cells through cloning. Until now, the idea of human cloning has only been possible through movie magic, but the natural progression of science is making human cloning a true possibility. We’ve cloned sheep, mice and cows, so why not humans? Some countries have set up laws banning cloning, but it is still legal in many countries. Imagine using a piece of your great-grandmother. This opens the door to many ethical problems, but it’s a door that could soon be opened.

　　S: So what happens next?

　　T: Whatever the reasons, the new cloning technologies have sparked many ethical debates among scientists, politicians and the general public. Several governments have considered or enacted legislation to slow down, limit or ban cloning experiments outright. It is clear that cloning will be a part of our lives in the future, but the course of this technology has yet to be determined. Cloning could cause birth defects, but it’s not going to change society. In the absence of any legislation or regulation, cloning attempts will quietly continue. Eventually, cloning will succeed (if it hasn’t happened already), and humankind will have taken another step down the road of biological engineering. You should study hard today, and you will be able to face this difficult problem and know how to deal with it.

　　Explanation

　　T: Now let’s deal with some language points. Turn to page 11. Let’s look at the sentence: It is a way of making an exact copy of another animal and plant. 全句漢語意思:它是一種精確復(fù)制另一個動物或植物的方式。Here a way of means a manner of 一種……的方式。

　　T: Turn to page 12. Look at the 8th line. Dolly’s appearance raised a storm of objections and had a great impact on the media and public imagination. In this sentence, raise means lead. (引起/導(dǎo)致)。全句意思是：多利的出現(xiàn)引起一場反對風(fēng)暴，并且對媒體和公眾思想產(chǎn)生了很大的沖擊。

　　T: Turn to page 12. Look at the sentence: However, scientists still wonder whether cloning will help or harm us and where it is leading us. “whether cloning will help or harm us”, “where it is leading us” is the objects of the word “wonder” 全句意思是：科學(xué)家一直致力于研究克隆到底會有助于我們還是會傷害我們，它們將我們引向何方。

　　Step V Homework

　　Ask the students to do the following.

　　1. Complete the exercises on page 13.

　　2. Recite the key sentences in the text.

　　3. What is Cloning? You might not believe it, but there are human clones among us right now. Have you ever wished you could have a clone of yourself to do homework while you hit the skate park or went out with your friends? Imagine if you could really do that. Where would you start?