中脉在脊髓内，由脊柱尾部海底轮（会阴穴）直升至（）。
A.顶轮
B.脐轮
C.心轮
D.眉轮
参考答案：A
My sister, who is______a red sweater now, ______a foreigner for 3 years.
A．having on; has married
B．dressed in; has got married
C．wearing; has been married to
D．putting on; has married with
如下各项中，有几项属于离心泵汽蚀时的伴随现象？（）
①泵体振动；
②流量和压头低于正常值；
③刺耳的噪音；④叶轮腐蚀；
⑤泵的泄漏。
A.2
B.3
C.4
D.5
