Internet(因特网)上最基本的通信协议是ftp。()

When his mother came in, the boy pretended       .

A．reading

B．being read

C．to read

D．to be reading

This is a _____ book that you may _____ in daily English study. [ ]

A. referring; refer to

B. referring; refer

C. reference; refer to

D. reference; refer

已知凸透镜的焦距f=10cm，当把蜡烛火焰置于凸透镜的主光轴前30cm处时，光屏上得到的像是（　　）

A．倒立、缩小的实像

B．倒立、放大的实像

C．倒立、缩小的虚像

D．正立、放大的虚像

将下面的词语连缀起来写一句话，要求至少运用一种修辞手法，意境优美，不超过80字。

夕阳   沙滩   老人   思念

答：________________________________________________________________________

伸直型肱骨髁上骨折常见的并发症是（）

A.骨折局部感染

B.血管神经损伤

C.肱骨下端缺血性坏死

D.脂肪栓塞

E.肱二头肌断裂