膝反射的反射中枢在（）。
A.胸髓12、腰髓1
B.腰髓1～2
C.腰髓2～4
D.腰髓5
E.腰髓5、骶髓1
参考答案：C
The old photo____ me____ my happy childhood, which was spent in a small village with my
grandparents. [ ]
A. reminds; to
B. remembers; of
C. reminds; of
D. remembers; to
技术改造的含义是什么？
