计算题：管壁厚度为＝6mm，管壁的导热系数＝200KJ/（m℃），内表面贴附厚度＝1

2011年11月17日是第十个世界哲学日。关于哲学与生活的关系，下列说法正确的是

①哲学源于生活，又对人们的生活有指导作用

②生活需要智慧，需要哲学

③哲学与生活相互影响，相互决定

④哲学的智慧产生与人类的实践活动

A①②③      B①②④     C②③④     D①③④

在两种基本测试方法中，______测试的原则之。一是保证所测模块中每一个独立路径至少要执行一次。

用括号内所给动词的适当形式填空。

1. I'll  tell our monitor the good news as soon as he ________ (come) back to school.

2. It was a pity that you ________ (not attend) the meeting last Friday afternoon.

3. We should think about what we can do ________ (keep) animals and plants

    from becoming endangered.

4. On May 12, 2008, Sichuan ________ (hit) by a strong earthquake

    which killed many people and destroyed many buildings.

5. Playing computer games is delightful, but ________ (spend) too much time on it may do harm.

6. Today, to hold the Olympic Games ________(consider) as a rich prize for a country.

7. Many changes ________ (take) place in our daily life since the invention of the computer.

8. The policeman said that he ________ (see) a Young Pioneer help an old woman cross the road the day

    before yesterday.

9. Our maths teacher ________ (prepare) the new lesson with other teachers in the office from

    2 to 4 yesterday afternoon.

10. The first step towards ________ (protect) the environment is to try to throw away less rubbish.

粒度小于300mm的煤样，缩分至3.75Kg之后，如使之全部通过3mm圆孔筛，则可用二分器直接缩分出不少于100g和不少于（）用于制备分析用煤样和作为存查煤样。

A、400g

B、450g

C、500g

D、700g