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问题 解答题

请准备一个锐角三角形的纸片，三个顶点分别标上字母A、B、C，并标出AB边的中点D及AC边的中点E.

（1）把△ABC沿DE对折，观察点A是否落在边BC上？答：点A（    ）（填“在”或“不在”）边BC上.

（2）在⑴的基础上将△ACE对折，使线段CE与EA重合，此时点A是否与点C重合？折出的图形中有几个直角？答：点A与点C （    ）.（填“重合”或“不重合”）； 图形中有（    ）个直角.

（3）在⑴⑵的基础上将△ADB对折，使线段DB与DA重合，观察折得的图形，说出新图形的名称是（    ）形.

（4）经过以上折叠，原△ABC的三个内角是否合并到一起了？这又说明何道理？答：原△ABC的三个内角（    ）合并到一起.(填“已经”或“没有”)； 说明的道理是：（    ）.

答案

⑴ 在； ⑵重合；2； ⑶长方形； ⑷已经；说明的道理是三角形内角和为180°

单项选择题

The days of elderly women doing nothing but cooking huge meals on holidays are gone. Enter the Red Hat Society—a group holding the belief that old ladies should have fun.
"My grandmothers didn’t do anything but keep house and serve everybody. They were programmed to do that," said Emily Cornette, head of a chapter of the 7-year-old Red Hat Society.
While men have long spent their time fishing and playing golf, women have sometimes seemed to become unnoticed as they age. But the generation now turning 50 is the baby boomers(生育高峰期出生的人) , and the same people who refused their parents’ way of being young are now trying a new way of growing old.
If you take into consideration feminism(女权主义) , a bit of spare money, and better health for most elderly, the Red Hat Society looks almost inevitable(必然的). In this society, women over 50 wear red hats and purple(紫色的) clothes, while the women under 50 wear pink hats and light purple clothing.
"The organization took the idea from a poem by Jenny Joseph that begins: When I am an old woman, I shall wear purple. With a red hat which doesn’t go," said Ellen Cooper, who founded the Red Hat Society in 1998. When the ladies started to wear the red hats, they attracted lots of attention.
"The point of this is that we need a rest from always doing something for someone else," Cooper said, "Women feel so ashamed and sorry when they do something for themselves. " This is why chapters are discouraged from raising money or doing anything useful. "We’re a ladies’ play group. It couldn’t be more simple," added Cooper’s assistant Joe Heywood.

From the text, we know that the "baby boomers" are a group of people who ______.

A．have gradually become more noticeable

B．are worried about getting old too quickly

C．are enjoying a good life with plenty of money to spend

D．try living a different life from their parents when they were young
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多项选择题

在北伐战争期间，中国人民反帝斗争取得了重大胜利，收回的租借地是（）。

A．上海

B．九江

C．汉口

D．旅顺
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