Unit 3 Science versus nature教案

unit 3 science versus nature教案
module5 unit 3 science versus nature語言點
reading
1. on the other hand, some scientists point out that if you clone an embryo, you can produce valuable human tissues---such as bone or lung tissue—that could be used to save human lives. on the other hand, many people, including some scientists, disagree and are afraid that, if mankind toys with nature in this way, we may be on our way to producing a real-life frankenstein’s monster.
(1) on (the) one hand…on the other hand…一方面…另一方面…
on one hand, rapid development of the economy will improve the living conditions of people. on the other hand, it will speed up environmental destruction.
(短語) at hand 在手邊，在附近                      by hand 用手；親手
in hand 手頭現有的，正在進行，在處理中      hand in  交上來
hand out 分發                       hand over移交
hand down 把…傳下去              hand in hand手拉手   

(2) point at，point to和point out的意思都與“指”有關，但還是有一定區別。
point at習慣上表示指向離說話人較近的事物，意為“指著”，at是介詞，著重于指的對象。point to多用來表示指向離說話人較遠的事物，意為“指向”，to也是介詞，著重于指的方向。point at可分開使用，point后直接跟名詞或代詞作賓語，at表示方向，而point to卻沒有這種用法，但它還表示“顯示、說明”的意思。
point out表示的是給某人指示方向，要點或錯誤等，意為“指出”，out是副詞。
根據句意，用point at，point to或point out的適當形式填空。
1.the teacher is pointing at/to the map on the wall.
2. both the hour hand and the minute hand point to twelve. it was noon.
3..can you point out the man you suspect?
4. all the evidence points to his guilt.
5. they pointed their guns at her head but she was not afraid.
on the point of doing sth when正要做某事。。。突然  
to the point擊中要害       a turning point 轉折點 
explain …point by point逐點解釋
(3) toy with玩弄；不認真對待
她指責那個年輕人玩弄她的感情。
she accused the young man of toying with her feelings.
那個小女孩只是把食物撥弄著玩兒，因為她并不餓。
the little girl just toyed with her food , as she wasn’t really angry.
(4) on one’s (the) way to doing sth.  “正在做某事的過程中,即將成功,離…不遠了”. to是介詞，后接名詞、代詞或動名詞短語.