已知（2，a）和（﹣3，b）在一次函数y=﹣x+8的图象上，则 [ ]
A．a＞b
B．a＜b
C．a=b
D．无法判断
答案：B
—When were you born?
一I was born ______ the morning of June 18th, 1975. [ ]
A. in
B. on
C. at
D. to
眼眶内侧壁由哪些结构组成
A．额骨眶板、蝶骨小翼B．上颌骨额突、泪骨和筛板C．上颌骨、颞骨D．泪骨、额骨眶板E．额骨眶突、蝶骨大翼
