工程施工招标采用固定总价合同结算时，确定合同结算价格的工程量应该以（）。A．中标的工

软件开发的初期包括【 】、总体设计、详细设计3个阶段。

The twins look alike, but they _____ each other in temperament. [ ]

A. different from

B. differ from

C. transform

D. distinguish

在研究过程中，为了保证研究结果的真实性，一般应答率应该达到______

A．50%以上
B．70%以上
C．90%以上
D．95%以上

Both bus and tree topologies are characterized by the use of multipoint (16) ．For the bus，all stations attach，through appropriate hardware (17) known as a tap，directly to a linear transmission medium，or bus．Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the (18) ．A transmission from any station propagates the length of the medium in both directions and can be received by all other (19) ．At each end of the bus is a (20) ，which absorbs any signal，removing it from the bus．

A．processing

B．switching

C．routing

D．interfacing

年轻女性，用牙线清洁牙齿时牙龈有时出血。检查：牙龈 * * 轻度充血、水肿，PD：2～3mm，未及附着丧失。此患者最可能的诊断是

A．边缘性龈炎

B．青少年牙周炎

C．牙间 * * 炎

D．青春期龈炎

E．急性坏死性龈炎