《煤矿矿长保护矿工生命安全七条规定》要求煤矿必须在批准区域正规开采，严禁超层越界或者 发布时间：2018-01-04 16:56 │ 来源：www.tikuol.com 题型：单项选择题 问题： 《煤矿矿长保护矿工生命安全七条规定》要求煤矿必须在批准区域正规开采，严禁超层越界或者（ ）。A．机械化作业B．长臂式采煤C．巷道式采煤、空顶作业
题型：单项选择题 补全对话。从对话后的方框中选出能完成对话的选项，有两项为多余选项。 A: Tom! It's eight o'clock. (1) B: OK. Could you find my shoes for me. Mom? A: Here they are in the box under the desk. B: (2) A: It's time for breakfast. There are three eggs and some milk on the table. B: Sorry. Mom. (3) Could you put them in my school bag? A: Why? (4) B: I'm going to school,I'm late. A: (5) B: Oh, it's Saturday.I don't go to school on Saturday. A. Thank you. Mom. B. What are you doing? C. I'm going to be late for school. D. But don't you know what day it is today? E. It's time to get up. F. It's time to go to bed. G. Where are you going? 查看答案
题型：单项选择题 下列实验操作及现象合理的是 [ ]A．硫磺在空气中燃烧发出黄色的火焰 B．红磷在空气中燃烧，产生大量白雾 C．选用10mL量筒量取5.5 mL 蒸馏水 D．铁粉溶于足量稀硫酸中，形成黄色溶液 查看答案