把8a3﹣8a2+2a进行因式分解,结果正确的是( )
A:2a(4a2﹣4a+1)
B:8a2(a﹣1)
C:2a(2a﹣1)2
D:2a(2a+1)2
─ Mrs. Zhang was sent to teach English in a poor mountain village last year.
─ She said she would never forget some pleasant ______ while working there.
类别
数量
比重
自然科学与应用技术
399
70.4%
社会科学与史地哲等
113
19.9%