下面列出的安全计算软件不能计算的脚手架有（）
A.门式脚手架
B.扣件式落地脚手架
C.扣件式悬挑脚手架
D.碗扣式脚手架
参考答案：D
When asked about their opinions about the schoolmaster, many teachers would prefer to see him step
aside ________ younger men.[ ]
A. in terms of
B. in need of
C. in favour of
D. in praise of
试述对习惯性购买行为的主要营销策略。
