单项选择题
A.需B.不需C.逐渐D.边打边进
A.0.4-0.7B.0.45-0.75C.0.5-0.8D.0.55-0.85
A.0.3-0.7B.0.4-0.8C.0.5-0.9D.0.6-1.0