(教师让学生再读1a.找出含有时间状语从句的句子.) T: Boys and girls. Read 1a again and find out the sentences with“when ,“after ,“as ,“as soon as ,“until , and“while . (学生找出含有时间状语从句的复合句后.教师让学生独立完成1b.) T: Boy and girls, you did a good job! Now please turn to page 38 and complete the short passage in 1b. This time you needn’t read 1a. (当然对于一些基础不太好的学生也可降低要求.可让他/她看着1a完成.) (教师与学生核对答案.可集体完成也可个别抽查.) T: Let’s check the answers. 查看更多

 

题目列表(包括答案和解析)

科学家通过基因工程培育抗虫棉时,需要从苏云金芽孢杆菌中提取出抗虫基因,“放入”棉花的细胞中与棉花的DNA结合起来并发挥作用,请回答下列有关问题:
⑴ 从苏云金芽孢杆菌中切割抗虫基因所用的工具是______________,此工具主要存在于__________中,其特点是_________________________________________________。
⑵ 苏云金芽孢秆菌一个DNA分子上有许多基因,获得抗虫基因常采用的方法是“鸟枪法”。具体做法是:用______________将苏云金芽孢杆菌的__________切成许多片段,然后将这些片段____________________________,再通过_______________转入不同的受体细胞,让它们在各个受体细胞中大量______________,从中找出含有目的基因的细胞,再用一定的方法把__________________分离出来。
⑶ 进行基因操作一般要经过的四个步骤依次是________________________________、____________________________________、___________________________________、____________________________________。

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  People bathe in a different way.Most Americans never take a bath.They soap and rinse off under the shower.The English always takes a bath.First,they sit in a bathtub full of warm water.Then they soap themselves,and finally,they rinse off the soap in the shower,all in the same water,The Japanese,on the other hand,first wash with soap in the shower.Then they go and sit in a bathtub full of warm water for twenty minutes or more.Later,others in the family use the same water to sit and relax in.

  The Thai do not get into a shower or a bathtub.They stand in a room or an area of a house where there is a big jar full of water.With a bowl they pour water from the jar on themselves.In order that other people do not see their bodies,the Thai always wear a long piece of cloth called around their bodies.They wear this when they are bathing.

  Everyone gets clean in a different way.We know that washing is good and healthy for us.But this was not true in the past.Up to 1800,most Americans did not bathe because they thought it was bad for them.

(a)读短文,找出主要意思

1.Everyone________.

A.takes a bath every day

B.bathes in a different way

C.takes a shower every night

D.hates taking a bath

2.The Thai________.

A.have a shower

B.have a bath

C.do not have a bath or a shower

D.take a bath or a shower every day

3.People________.

A.have different ways to get clean

B.think it is bad to get clean

C.always bathe

D.never bathe

(b)从括号中选出可以替换画线部分的单词或短语,

4.Everyone washes himself in a different way.

5.The Thai have a big container(容器)like a vase full of water.

6.The English sit in a large container where you sit to wash your whole body.

7.Washing is good for your body.

8.The English wash with water to take off the soap in the same water they sit in.

9.The Thai wash in a part of the house where there is a big jar.

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找出含有题前所给词加粗部分读音的单词

rich

[  ]

A.machine
B.change
C.headache

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找出含有题前所给词加粗部分读音的单词

trouble

[  ]

A.enough
B.cough
C.serious

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找出含有题前所给词加粗部分读音的单词

corner

[  ]

A.storm
B.worst
C.visitor

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