喜温作物生长适宜温度在()A、20-30℃ B、30-35℃ C、35-40℃ D、 发布时间：2017-03-02 02:03 │ 来源：www.tikuol.com 题型：单项选择题 问题： 喜温作物生长适宜温度在()A、20-30℃B、30-35℃C、35-40℃D、40-45℃
题型：单项选择题 综合填空。A. white B. harmful C. are D. water E. and so on F. produces G. soil H. air I. sick J. breathing Do you know how pollution hurts the earth? Now let me tell you. There 1 all kinds of pollution. The chemical plant 2 terrible gas. It's called 3 pollution. It makes people 4 . It causes 5 problems and even cancer. Farmers use fertilizer too much, so 6 pollution is difficult to be stopped. Every year people pour a lot of waste into rivers, lakes 7 . So 8 pollution is widely spread. Light pollution is 9 to our eyes.What's more, 10 pollution influences the look of our cities. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 查看答案
题型：单项选择题 已知数列{an}是公差不为0的等差数列，a1＝2，且a2，a3，a4＋1成等比数列．(1)求数列{an}的通项公式；(2)设bn＝an＋2an，求数列{bn}的前n项和Sn. 查看答案
题型：单项选择题 患者，男，35岁，有被害妄想，认为饭中有毒而拒食，此时护士的正确做法是（）。A.不勉强患者进食，让其饥饿再进食B.强行喂食C.把患者约束起来，直至同意进食为止D.带去餐厅与其他病友一起进食E.进行静脉输液 查看答案