单词拼写。

1.  Many roads are under ______(建设),which leads to much inconvenience.

2. I am to b______ for the great loss rather than her.

3. I am afraid the teacher is not _______(可找到的) at this moment.

4. Law r______ everyone should pay the tax.

5. The book made a good _______(印象) on him.

6. From his appearance we may safely______(断定) that he is a chain smoker.

7. She dressed up in the c______ of a cartoon charater greeting people in the park.

8. He was a______ of speaking to others with a mouthful of food.

燃料油在某加热炉燃烧后所生成的烟气中，经分析含二氧化碳的体积百分数为8%，加热炉过剩空气系数α为1.25，则燃烧生成的烟气中氧气与二氧化碳的体积比为（）。

A.0.58：1

B.1：0.58

C.0.41：1

D.1：0.41