A proper approach to ________ your learning efficiency is of great significance to every student.

A．improving

B．improve

C．be improving

D．having improved

模板及其支架应具足够的承载能力、刚度和稳定性，应能可靠的承受新浇筑砼的自重，侧压力和施工过程中所产生的荷载以及风荷载。