松藻煤电公司规定,瓦斯峰波预测煤与瓦斯突出危险指标,掘进工作面本循环与上一循环放炮后瓦斯峰值、波宽比值是()。
参考答案:≥2或≤1/2
读对话,判断正(√)误(×)。
Pig: How many rabbits are there in your room?
Rabbit: There are twenty rabbits.
Pig: Can you cook the meals?
Rabbit: No, I can't.
Pig: Can you set the table?
Rabbit: Yes, I can.
Pig: Can you clean your room?
( ) 1. There are 20 rabbits in the room.
( ) 2. The rabbit can't cook the meals.
( ) 3. The rabbit can't set the table.
( ) 4. The rabbit can clean the room.
我国最早将民族区域自治思想制度化、法律化的文件是( )。
A.1930年的《中华苏维埃共和国国家根本法(宪法)大纲草案》
B.1941年的《陕甘宁边区政府施政纲领》
C.1946年的《陕甘宁边区宪法原则》
D.1949年的《共同纲领》