停炉后为了防止煤粉仓自燃,应()。
A.找开煤粉仓挡板通风
B.关闭所有挡板和吸潮管
C.打开吸潮管阀门,保持粉仓负压
D.投入蒸汽消防
参考答案:B
单词考查。
1. N______ of them is a teacher, they are both students.
2. Have you h______ of the exciting news? Yes, I have.
3. There are many children playing here, It is too n .
4. Don't all speak at the s time, Please say it one by one.
5. I don't like maths, John doesn't like, e______.
The maxillary nerve leaves the skull through ()
A.the foramen ovale
B.the foramen rotundum
C.the stylomastoid foramen
D.the foramen spinosum
E. the internal acoustic pore