2. 在一个工厂的废料堆里,堆放着大量不规则的四边形木料(如图),这些木料的大小和形状是一样的。如果把它们做成比较规则的形状,必须锯掉一些边角,就要浪费很多木料。有人建议用这些木料来铺地板,你认为这些木料能密铺吗?为什么?

答案
2. 能。因为四边形的内角和是360°,按题图所示的拼法拼接就能填满这个平面,而且无缝隙,不重叠。因此,凡是有着同样大小和形状的任意四边形木块都可用来密铺。
一、给下列句子选择相应的图片。
A B
D E
(
(
(
(
(
A B
(
E
)1. I want to learn Chinese writing.(
D
)2. This is my painting. There is a tree.(
B
)3. There're three people in the picture.(
A
)4. The koala stands for Australia.(
C
)5. We eat five-coloured rice.答案
1.E 2.D 3.B 4.A 5.C
二、典典完成了漫画书的制作。请你读一读漫画书,完成任务。
1. 根据漫画内容,选择正确图片,将序号填入括号中。

A B C D
(1)This is Mark. He is my grandpa. He lives on a farm. (
(2)One day, he finds a robot. It is smart (聪明的). (
(3)The robot works hard to grow flowers in the garden. (
(4)In the evening, they like to look at the stars. (
2. 根据漫画内容,判断句子正(T)误(F)。
(1)Mark may (可能) be a farmer. (
(2)There is a garden on the farm. (
1. 根据漫画内容,选择正确图片,将序号填入括号中。
A B C D
(1)This is Mark. He is my grandpa. He lives on a farm. (
B
)(2)One day, he finds a robot. It is smart (聪明的). (
C
)(3)The robot works hard to grow flowers in the garden. (
D
)(4)In the evening, they like to look at the stars. (
A
)2. 根据漫画内容,判断句子正(T)误(F)。
(1)Mark may (可能) be a farmer. (
T
)(2)There is a garden on the farm. (
T
)答案
1.(1)B (2)C (3)D (4)A
2.(1)T (2)T
2.(1)T (2)T
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