气滞导致血瘀的生理基础是( )
A．血能养气B．气能行血C．气能摄血D．血能载气E．气能生血
参考答案：B
中国教育卫星宽带的极化方向是（），LNB本振频率是（）。
Which function is NOT served by building a prototype
A．It takes the place of the final syste
B．It assists in gathering software requirements
C．It assists in estimating the cost of the projec
D．It is used as the foundation of the larger project
