皮亚杰式早期教育方案的代表人物是()
A.拉瓦特里
B.韦卡特
C.凯米——德渥里斯
D.布鲁纳
参考答案:C
I support your decision, but I should also make itclear that I am not going to be __ to do it. [ ]
A. connected
B. fastened
C. bound
D. stuck
袋式除尘器的过滤作用通常由哪几方面效应产生?