城市环境的影响因素中,影响水体的环境的因素有多个。但下面叙述中()不是。 A.水体稀 发布时间:2017-05-21 18:38 │ 来源:www.tikuol.com 题型:单项选择题 问题: 城市环境的影响因素中,影响水体的环境的因素有多个。但下面叙述中()不是。A.水体稀释作用B.水体中的微生物C.水的酸碱度D.水体中氧的消耗和溶解
题型:单项选择题 自然界中有几千万种含碳物质,并循环转化。下列说法正确的是A.人的生命活动离不开碳循环B.森林的减少对碳的循环没有影响C.金刚石中碳原子间没有间隔D.地下的煤中碳原子是静止不动的 查看答案
题型:单项选择题 短文改错。Mrs White is a old woman who has a small room in a small village. She has been living there from 1970. That was the year when his husband died. He has been ill for many years. After his death, Mrs White had not money at all,so she found work in a small factory. Her job was clean the offices. She had to get up at 5 in the morning. Last year she was ill and her doctor told he not to working hard. Now Mrs White sells newspapers outside of a big shop in the middle of town. She still doesn't havemany money but she's very happy now. 1. _____2. _____3. _____4. _____5. _____6. _____7. _____8. _____9. _____10. _____ 查看答案