We often forget to enjoy the simplest things in our life such as flowers, trees, fresh air, walking with friends

and family, or _____ have a good time. [ ]

A. in the end

B. after all

C. in other words

D. at the same time

LF11是一种（）。

A、防锈铝合金，不可热处理强化

B、防锈铝合金，可热处理强化

C、硬铝合金，不可热处理强化

D、硬铝合金，可热处理强化