采用通风启封火区时,应以()的顺序打开防火墙。
A.先打开进风侧,在打开回风侧
B.先打开回风侧,在打开进风侧
C.两侧同时打开
D.与顺序无关
参考答案:B
进行单桩竖向抗压静载试验时,如标准差Sn≤0.15时,单桩竖向承载力标准值应取()。
A.平均值
B.最小值
C.平均值乘以折减系数λ
D.小值平均值
The manager of the company firmly believed that one of the important () sources of new customers was the children’s market.
A. unfolded
B. unknown
C. unsolved
D. untapped