离心泵转数由n<sub>1</sub>变为n<sub>2</sub>，其流量Q<sub>1</sub>到Q<sub>2</sub>的变化符合（）。<br>A:<img src="/Image1/79/7907b2d70ad4ff87fde3020f70dd5467.png" /><br>B:<img src="/Image1/07/07421437021c8cf8aed943ede5ff239e.png" /><br>C:<img src="/Image1/c0/c0fb5e969c6f8feffade6481f8397561.png" /><br>D:<img src="/Image1/24/24f38adb8ab4229da786766c8155c1f8.png" />