问题 填空题

连接正方形四边的中点所得到的新正方形的面积是原正方形面积______%,连接等边三角形三边中点所得到的新三角形的面积是原三角形面积的______%.

答案

(1)假设每个小三角形的面积为1,

则新正方形的面积÷原正方形面积=4÷8=0.5=50%;

(2)假设每个小三角形的面积为1,

则新三角形的面积÷原三角形面积=1÷4=0.25=25%.

故答案为:50,25.

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书面表达。|
     假如你是李华,你在杂志Panorama上读到以下广告:
Don't you want a better world for you and your children?
GREEN PLANET
Then why not join Association(协会) For Environmental Protection
Meetings informing you about what's happening in the world
Talks given
Materials, mailed to members, with uptodate reports, maps and fact files
MEMBERSHIP FEE $ 30之后你想加入这一组织。请你给该组织写
一封信,了解以下细节,并提出你对活动的建议。

meetings多久举行一次,地点
talks专家还是会员主讲
materials是否额外收费
membership fee对学生是否优惠
注意:
1. 词数:100左右;
2. 参考词汇:优惠的会员费 reduced membership fee 额外收费 extra charge
3. 信的开头和结尾已为你写好,不计入总词数。
Dear Sir/ Madam,
     I'm writing to you with regard to your advertisement published in the magazine “Panorama”. _____
_____________________________________________________________________________
     I am looking forward to hearing from you at your earliest convenience.
                                                                                                        Yours faithfully,
                                                                                                               Li Hua