热毒咽喉肿痛、痈肿疮毒及瘰疬痰核等，当选用的药物是（）
A.白芷
B.紫花地丁
C.玄参
D.升麻
E.紫草
参考答案：C
—Why did you come by bus?
---My car broke down yesterday evening and I ____ it repaired.
A．didn’t have
B．don’t have
C．won’t have
D．haven’t had
变压器出厂试验对套管电流互感器可只进行（）测试。
A.变比
B.饱和曲线
C.极性
D.直阻
E.绝缘试验
