检查井的钢筋混凝土盖板，搁置宽度每边应不小于（）。
A.50mm
B.100mm
C.150mm
D.200mm
参考答案：B
主题统觉测验属于问卷测验。（）
—My spoken English is poor, what shall I do?
—＿＿＿an English language club to practice, and you’ll be good at it.
A．Take part in
B．Attend
C．Join
D．Join in
