体积流量Q与断面平均流速ν及有效断面积A的关系是（）
A.Q=vA
B.Q=v/A
C.Q=A/v
D.Q=9.8vA
参考答案：A
选择正确的词语填空。
1. Dale has _______ ( few；fewer) Christmas cards than I have.
2. They believe that there will be ______( less；fewer) green trees in fifty years.
3. He is ill and he can eat ________ ( more；less) food. So he gets quite weak.
4. The father said to his son,"The _________( more；much) , the better. "
5. David has ___________(less; fewer)money than Anna has.
肝脏触之质地稍韧多见于( )
A．肝炎B．肝脓肿C．肝癌D．脂肪肝E．肝纤维化
