耳前淋巴结肿大常见于（）。
A.过敏性结膜炎
B.急性卡他性结膜炎
C.急性流行性出血性结膜炎
D.慢性结膜炎
E.春季角膜结膜炎
参考答案：C
– What are you busy with?
–An exam. It’s _______. If I pass it, I can get a job as a guide.
A．crucial
B．common
C．anxious
D．Frustrating
直流系统一点接地的危害？
