“蓬生麻中，不扶而直”反映了影响教育的因素是( )。
A．遗传因素
B．环境因素
C．主观能动性
D．综合因素
参考答案：B
They were ________ busy ________ with each other ________ the time. [ ]
A. too; to talk; to forget
B. too; talking; to forget
C. so; to talk; that they forget
D. so; talking; that they forgot
影响焊接变形的因素有哪些？
