对于离心泵来说（）是重要的部件，液体就是从其中得到能量的。
A、平衡盘
B、吸入室
C、蜗壳
D、叶轮
参考答案：D
△ABC中，下列说法正确的是（ ）
A．asinA=bsinB
B．若A＞B，则sinA＞sinB
C．若A＞B，则cosA＞cosB
D．若sinB+sinC=sin2A，则b+c=a2
Speaker A: Did you know that Whitney Houston was giving a concert last night in the town Speaker B: （）
A. Why don’t you get some tickets for us
B. I like her, but I didn’t have time for the concert.
C. Why didn’t you tell me about it earlier
D. Maybe we can go to see her concert some other time.
