塔顶全凝器改为分凝器后，其他操作条件不变，则所需理论塔板数（）。
A、增多
B、减少
C、不变
D、不确定
参考答案：B
By age 7 months, an infant most likely will develop which of the following motor skill
A．Walk with one hand held.
B．Eat successfully with a spoon.
C．Stand while holding onto furniture.
D．Sit alone using the hands for support.
杆塔拆除，整体倒塔时应有专人指挥，设立（）倍倒杆距离警戒区，由专人巡查监护，明确倒杆方向。
A.0.8
B.1
C.1.2
D.1.1
