异步电动机启动方法可分为直接启动（）启动。
参考答案：降压
At the sports meeting, Amy ran ______.
A．as fast as she can
B．as soon as she could
C．as fast as she could
D．as sooner as she can
易引起肾小球损害而出现蛋白质、血尿的血管炎是（）
A.川崎病
B.变应性肉芽血管炎
C.Wegener肉芽肿
D.过敏性紫癜
E.显微镜下多血管炎
