Nobody __________ any more to say, the meeting was closed
A .had
B. has had
C. having
D. had had
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Yon can write the paper______ you 1ike
A. whatever
B. however
C. anyway
D. some way
锅炉上装设的安全泄压装置是()
A. 安全阀
B. 易熔塞
C. 防暴片
D. 防暴冒
木材用明火点燃时,最低着火点()℃
A. 135
B. 159
C. 250
D. 300
按照消防的有关规定,()m以上建筑物为高成建筑。
A. 24
B. 30
C. 34
D. 40