沉积岩是怎么形成的？有什么特点？

敢于直言，向唐太宗进谏二百多次的大臣是 ：（    ）

A．姚崇

B．房玄龄

C．魏征

D．杜如晦

飞机库内爆炸火灾危险区域仅属局部区域，应按二类防雷建筑物防感应雷击，按( )防直接雷击。

A．一类防雷建筑物

B．二类防雷建筑物

C．三类防雷建筑物

D．一类或二类防雷建筑物

阅读下面短文，将文中划线部分译成汉语或英语。

    Food is very important. Everyone needs to eat well if he or she wants to have a strong body. 1 Our minds

also need a kind of food. This kind of food is knowledge. We begin to get knowledge even we are very young.

2 孩子们对周围的一切都感兴趣.They learn something when they are watching and listening. When they are

getting older, they begin to read storybooks, science books and anything they like. 3 When they find something

new, they love to ask questions and try to find out the answers.

   4 获取知识的最佳方法是什么呢? If we learn by ourselves, we will get the most knowledge. If we are

always getting answers from others and do not ask why, we will never learn well. 5 If we study in the right

way, we will learn more and understand better.

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2                                                                                              

3                                                                                              

4                                                                                              

5                                                                                              

机电维修岗位电焊工，在电焊作业前应做好哪些检查工作？

使用灭火器灭火，要由近及远地灭火，逐步推进。