依据现行《建筑设计防火规范》的规定,乙类厂房的配电所必须在防火墙上开窗时,应设置密封固()。
A.甲级防火窗
B.乙级防火窗
C.丙防火窗
D.普通窗
参考答案:A
阅读短文,根据短文内容和首字母提示填空。
Mr. and Mrs. Green h __1__ a big house. Their house h __2__ a kitchen (厨房), four bedrooms and
three other rooms. There are some trees n __3__ to their house. They have two cars. One is for Mr.
Green and the other is for Mrs. Green.
They have two children. One is a s __4__, and the other (另一个) is a d __5__. The children like
s __6__ very much. The son has five b __7__, nine s __8__ balls and many baseballs. He likes playing
basketball every day. The daughter has eight v __9__, ten ping-pang balls and seven t __10__ balls. She
plays tennis ball every day.