风湿热心脏炎的抗风湿治疗首选（）
A.青霉素
B.糖皮质激素
C.阿司匹林
D.免疫球蛋白
E.环磷酰胺
参考答案：B
By the time she’s twenty , she __ almost everywhere in the world!
A．will be
B．would have been
C．will have been
D．would be
电动机运行中应注意哪些事项？
