燃气管道横断面图中主要搞清楚各种管道的相对位置及（）。
A.管件尺寸
B.安装尺寸
C.配件尺寸
D.管件数量
参考答案：B
He _ ___ in his English test paper. His teacher was very angry with him.[ ]
A. makes some mistake
B. make a mistake
C. made few mistake
D. made many mistakes
某混凝土烟囱（如图），抗震设防烈度8度，设计基本地震加速度为0.2g，设计地震分组为第一组，场地类别为Ⅱ类，试验算相应于烟囱基本自振周期的水平地震影响系数，与下列何项数值最为接近？（）
A．0.059
B．0.053
C．0.047
D．0.035
