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(共22张PPT)
Unit 5 　Revealing nature
夯实词汇
一 重点单词
1．____ n. 种子，籽
2．______ n. 样本
3．________ n. (动物的)原种，祖先
4．_______ v. 减少；衰退；下降
5．_____ v. 责怪，指责；把……归咎于 n. 过失；责备
seed
sample
ancestor
decline
blame
6．____ n. 山羊
7．_________ adj. 原始的， 低等的
8．____ n. 根
9．____ v. 把……联系起来；连接
10．__________ n. 厘米
goat
primitive
root
link
centimetre
二.根据语境和汉语提示写出正确的单词
1．Mary was pleased to see that the _____ (种子) she had planted in the garden were growing.
2．The origin of what is now generally known as modern art can be ______ (把……联系起来) to social changes of the 18th century.
seeds
linked
3．Some of Canada's earliest settlers, who are thought to be _________ (祖先) of the indigenous peoples, crossed the Bering Strait.
4．The difference between the two _______ (样本) was not statistically significant.
5．It can take a hundred years to grow a few ___________(厘米).
samples
centimetres
ancestors
三 派生单词
1．_______ adj. 遥远的；远处的；冷淡的；疏远的→________ n. 距离
2．_______ n．地质学→_________ n．地质学家
3．______ v．进化→_________ n．进化(论)→_______ adj.进化的
4．_______ v．猜想，怀疑，觉得 n．嫌疑人，可疑分子→_________ n．怀疑，疑心；嫌疑→__________ adj.怀疑的；可疑的
distant
distance
geology
geologist
evolve
evolution
evolved
suspect
suspicion
suspicious
5．________ v. 产生，创造→__________ n. 一代；产生
6．_________ n. 特点；角色；人物→______________ n. 特征，特性；品质
7．______ v. 发现，察觉(尤指不易觉察到的事物)→_________ n. 侦探，警探→_________ n. 侦查；探测→________ n. 探测器
8．______ n. 真菌→______ adj. 真菌的
generate
generation
character
characteristic
detect
detective
detection
detector
fungus
fungal
四.用所给词的适当形式填空
1．Though there is a long ________ between Tom and his family, they don't feel _______．(distant)
2．With these measures, it is believed that the beauty of Li River will be preserved for ___________ (generate) to come.
3．The police _________ that two of the ________ caught yesterday were connected with another case. They were more __________．(suspect)
distance
distant
generations
suspected
suspects
suspicious
4．They ________ that a private _________ had been tailing them for several weeks. (detect)
5．They discovered the cave a month ago but __________ (geology) can't judge its age with certainty.
6．There are five ___________ in this play, and they have their own _____________．
(character)
7．The keynote speech is about the _________ (evolve) of the computer.
characters
characteristics
evolution
detected
detective
geologists
五 重点短语
1．_______________ 响应号召
2．___________ 有史以来；一直
3．___________ 讨论中的；考虑中的
4．_______________ 拥塞；挤满；充满
5．_____________ 出现；产生
6．________ 适应/适合……
7．____________ 各种各样的
answer the call
of all time
in question
be crowded with
come to exist
adapt to
a variety of
8．_______________ 微量的
9．____________ 把……赶走
10．__________ 也；还；以及；与……一样好
11．_________________ 追溯到
12．___________ 更重要的是，而且
13．_____________ 是耻辱，是丢脸的事
14．_____________ 与……相似
date back to/from
what's more
be a disgrace
be similar to
tiny amounts of
as well as
drive．..away
15．源于……的，原产于…… ____________
16．把……归咎于…… _____________
17．实施 _________
18．呼救 _____________
19．并排；肩并肩 ____________
20．和……交流 ________________
be native to
blame．..on．..
carry out
call for help
side by side
communicate with
六 重点句式
1．动词的－ing形式短语作后置定语
What's more, he had recently received a letter from his father __________ (预言) that he would be “a disgrace to yourself and all your family”．
2．as引导的时间状语从句
___________________ (当他研究这些样本时), he asked himself the question：how did different species come to exist
predicting
As he studied these
3．so．..that．..如此……以至于……
But Darwin's scientific studies were __________________ (如此有说服力以至于) more and more people started to believe his theory.
4．“be＋adj.＋to do”结构
Gregor Mendel chose to study pea plants because their characteristics ____________________ (容易控制)．
5．sb. is said to have done．..据说某人曾……
Alexander the Great and Marco Polo _________________________ (据说曾见到) such a tree in India.
were easy to control
were said to have visited
so convincing that
七.句式仿写
1．这是一项对社区所有残障人士都有好处的政策。
This is a policy ___________________________ in the neighborhood.
2．随着社会的快速发展，我们发现和朋友聚会的时间变少了。
____________________________we find less time to gather with our friends.
benefiting all the disabled
As the society develops rapidly,
3．我被这个节日深深吸引，甚至都不想回去了。
I ______________________________________ I didn't even want to get back.
4．我不仅容易相处而且我也乐意帮助处在困境中的人。
I am not only _________________________ but also willing to help others in trouble.
5．据说他发现了一种提高工作效率的新方法。
He _____________________________________ to improve work efficiency.
easy to get along/on with
was said to have discovered a new way
was so deeply attracted to the festival that
八 语法填空
Camouflage (伪装) is a way that allows an organism to blend (融合) into its surroundings and avoid
1 (see). An organism's shape, pattern, colour or even movement are all the things that can provide camouflage.
being seen
Camouflage allows an organism to hide in plain sight, whether a predator (捕食者) 2 prey. A leopard's fur blends into the leaf shadows when it lies on a branch. That helps this predator attack unsuspecting prey. Prey can also benefit 3 camouflage. A stick insect looks, and even moves, like a dry stick, 4 may prevent it from becoming someone's lunch.
or
from
which
Plants use camouflage, too. For example, a plant
5 (call) Fritillaria delavayi (梭砂贝母) has developed its drab colouring in 6 (respond) to humans collecting it. The plant 7 (list) in the IUCN Red List of Threatened Species for many years.
called
response
has been listed
For some species, camouflage 8 (be) more than colours and patterns. The flat－tail horned lizard (扁尾角蜥) flattens its body against the sand. The lizard's unique body shape lacks obvious angles. That means the desert sun casts no shadows that give away its presence.
is
Some organisms can even alter their appearance in real time. The panther chameleon (豹变色龙) needs only a minute or two to colour－shift 9 (match) nearby surfaces.
Humans make use of camouflaged clothing, too. The most common 10 (apply) appears on military or hunting gear.
to match
application
Thank you

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