第4题: [单项选择]轻度急性有机磷农药中毒时胆碱酯酶值在() A. 100% B. 70%~50% C. 50%~30% D. 30%以下 E. 80% 参考答案:B
第5题: [单项选择]What does Mr. Green teach A. English. B. Chinese. C. Maths. 参考答案:A 答案解析:[听力原文] W: What do Mr. and Mrs. Green teach M: Mr. Green teaches English, but Mrs. Green teach