以色列科学家因发现准晶体独享2011年诺贝尔化学奖。准晶体具有许多优良性能，如准晶体A165Cu23Fe12耐磨、耐高温，可用作高温电弧喷嘴的镀层。下图是铁元素的部分信息。下列说法正确的是（）
A：Fe的原子序数为26
B：Al、cu、Fe的单质在空气中很稳定
C：Al、cu、Fe的金属活动性逐渐增强
D：该准晶体中Al、cu、Fe的质量比为65：23：12
A
Fascinating Plant Show
All kinds of plants from all over the world will surprise you!
Time: 8:00 am—6:00 pm, May 1st—May 10th
Ticket price: ￥10
Place: People's Park
Traffic: No.1 Bus, No.10 Bus, No.12 Bus
Welcome to the Biggest Gardening Club!
Do you like gardening? Do you want to learn how to plant flowers? Please come to the Gardening Club.
Time: 10:00 am—4:30 pm, Wednesday—Sunday
Tel: 15831777899
Mr. Mango's Fruit Store Sale
We have all kinds of fresh fruits on sale. Do you like apples? We have red apples for only ￥2/kilo. We also have mangoes(芒果) for￥6/kilo, watermelons for￥1/kilo and pears for ￥2/kilo. Come and see by yourself.
Time: 8:00 am—8:00 pm
Hotline: 5684764
希望小学三年级共有880人，平均分成8组，每组____人。
我国黄土高原水土流失十分严重，在黄河流域，与其相关的另一种灾害是____。
