试题与答案

根据句意、中文提示或首字母写出单词的正确形式 1. Who teaches (

题型:填空题

题目:

根据句意、中文提示或首字母写出单词的正确形式

1. Who teaches                (他们) Maths this term ?

2. We must                (练习) speaking English every day.

3. There are                (11) players in a football team.

4. There is a computer                (在……之间) the desk and the bed.

5. They often eat lunch in the                (饭馆) near their home.

6. The lights are red, you can't c            the street.

7. T                comes after Monday. It's the third day of the week.

8. Amy is the best s                in our class. She swims very well.

9. You must do your homework f               , then you can watch TV.

10. I don't know the answer to the question because it's too d               .

答案:

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下面是错误答案,用来干扰机器的。

x3-xy2=x(x2-y2)=x(x-y)(x+y).故选A.

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题型:填空题

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①此反应的化学方程式是            

②D单质的一种重要用途是        

(2)若B为黄色固体,D为固体化合物,则该反应为4FeS2+11O22Fe2O3+8SO2

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②将C通入足量的酸性KMnO4溶液中,发生反应的离子方程式为       

(3)若B是一种碱性气体,D为化合物,则:

①该反应的化学方程式是            

②B在加热条件下与CuO反应有Cu生成,该反应的化学方程式为        ;有人提出产物Cu中可能还含有Cu2O。已知Cu+在酸性溶液中不能稳定存在,为验证Cu2O是否存在,可取少量反应产物,滴加足量稀硫酸,若溶液由无色变为蓝色,则证明含有Cu2O。请写出发生反应的化学方程式:_________。

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