创新性教育要特别考虑到()。
A呈现式、发现式和创造式
B聚合思维和发散思维的效果
C创造教学与学生身心发展规律的关系
D学科教学、教学方法和课外活动的作用

A. be secured in a position so that it rests firmly against the ship's side from which the discharge operations are carried out
B. have at least two replacement steps which are secured in position by a method different from that used in the original construction
C. have battens made of hardwood，or other material of equivalent properties，in one piece and not less than
D. have steps made of softwood，or other material of equivalent properties，made in one piece free of knots，having an efficient slip surface