_________they had _________with each other over a cup of coffee!

A．How fun, chatting

B．What fun, chatting

C．What a fun, chatting

D．What a fun, chatted

对骨的X线像描述错误的是（）

A.骨表层骨密质表现均匀致密

B.骨内部松质呈密度较低的网状影像

C.骨干表面的骨膜正常时不显影

D.少年骨的骨干与骨骺之间常显示有带状透亮区

E.骨干表面的骨膜异常时不显影