煤矿安全生产相关法律有哪些？
参考答案：
《安全生产法》、《煤炭法》、《矿山安全法》、《刑法》、《矿产资源法》和《劳动法》等6个。
方程（x+5）（x-7）=-26，化成一般形式是______，其二次项的系数和一次项系数的和是______．
通读下面的对话, 然后根据上下文补全对话内容。
A: Have you小题1:r_________ today’s newspaper?
小题1:
B: No, I haven’t. 小题2:W_________ there any important news?
小题2:
A: There’s a小题3:r_________ about the population of our country. It says we have got another 16,000,000 people this year.
小题3:
B: Oh, the population is growing faster and 小题4:f______.
小题4:
A: If the population goes on小题5:g_________, it will be the 小题6:b_________ problem in our country.
小题5:
小题6:
B: Of course. The population of the babies born in one year in China is 小题7:a_________ as large as the population of Australia.。
小题7:
A: I’m afraid there will be only 小题8:s_________ room for us some day.
小题8:
B: But if every family has only小题9:o_________ baby, things will turn 小题10:b_________.
小题9:
小题10:
