工程招标人与中标人签署合同时，中标人需要提交( )。A．履约担保 B．支付担保 C

把一个长方形的长减少5厘米，得到一个周长是16厘米的正方形，原来长方形的周长是（    ）厘米，面积是（    ）平方厘米。

肺段隔离症影像学表现为()

A．肺内孤立结节，无分叶，边缘有毛刺，发病前有发热史

B．肺内孤立结节，内有爆米花样钙化

C．右上叶后段结节，边缘光整，周围有卫星灶，增强扫描结节无强化

D．肺内孤立结节，有分叶和毛刺，远端有胸膜凹陷征

E．左下叶后基底段肿块，CT增强扫描示胸主动脉分支进入肿块

目前脑积水治疗最常用的手术方式是（）

A.脑室腹腔分流术

B.脑室心房分流术

C.Torkildsen分流术

D.第三脑室造瘘术

E.腰蛛网膜下腔一腹腔分流术

Although the bulk of industry resources and energies have focused on developing the fastest (11) or slickest (12) , more and more mindshare is turning to the evolution of the computer interface. Advancements in the areas of input devices, (13) processing and virtual reality could lead to fundamental changes in the way human and computer interact. The technological battlefield of the future will be adding layers between the user and the raw machine to make the (14) as invisible as possible. (15) represents the next evolutionary step for the interface.

（11）是（）

A.microprocessor

B.operatingsystems

C.voice

D.interface