图示结构各杆EI=常数，其C端的水平位移（→）为：（）

A.225／4EI

B.225／8EI

C.0

D.80／EI

When introducing a man and a woman, we mention the woman’s name first unless （）.

A. the man is much older than the woman

B. the man doesn’t like the woman

C. the man is very famous

D. the woman is very famous