第3题: [单项选择]蓼大青叶含靛蓝(C16H10N2O2)不得少于
A. 0.05% B. 0.5% C. 0.1% D. 1.0% E. 2.0% 参考答案:B
第4题: [单项选择]Why was the man late A. His car was sent to a garage. B. His car was held up by the traffic. C. His car broke down. 参考答案:C 答案解析:[听力原文] W: We have been waiting for you for more than half an hour. Where have you been M: I’m