问题
单项选择题
一般来说，重金属在哪种土壤中容易迁移
A．腐殖质含量高的土壤
B．颗粒小的土壤
C．pH值低的土壤
D．呈还原状态的土壤
E．湿度大的土壤
答案
参考答案：C
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一般来说，重金属在哪种土壤中容易迁移
A．腐殖质含量高的土壤
B．颗粒小的土壤
C．pH值低的土壤
D．呈还原状态的土壤
E．湿度大的土壤
参考答案：C
Good morning, ladies and gentlemen. I’ll give you a quick introduction to the school before I you around. Our school is called a “free school”. This means that pupils are free to choose what and how they want to learn. The school opens at 9 am, the children can arrive a little late if they like. Most of them are in school by ten. eight and nine most are in the living room and the kitchen downstairs. This is also a time children and teachers can work out what they are to do for the day. Now if you look the door of that big room, you will see those children busy doing something there. Several children are in the kitchen Miss Cabell with lunch. The children take to do this. After lunch it’s someone else’s job to do the washing-up. This job isn’t and not many of them like to do it. After lunch the children go on with what they’ve been doing school is over. On Friday we sometimes take the children to a cinema or a museum. The school is also every weekend for those children who want to come.
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