如图：在平面镜前有A、B两发光点，要想通过镜子观看时，它们的像正好重叠，试画图说明应在什么方向观看？
So much of interest _____ that most visitors simply run out of time before seeing it all. [ ]
A. offers Beijing
B. Beijing offers
C. does Beijing offer
D. Beijing does offer
组成跟腱的肌腱包括（）。
A.胫前肌腱
B.胫后肌腱
C.腓肠肌腱
D.腓骨长肌腱
E.比目鱼肌腱
