含马兜铃酸，使用时注意对肾脏的损害（）
A．二冬
B．二术
C．二母
D．二活
E．二枫藤
参考答案：A
I _____ have a business trip to Hong Kong tomorrow. Can you help me prepare for it? [ ]
A. Have gone to
B. am going to
C. was going to
D. have been to
色谱仪放空管线是否需要引到仪器房外？为什么？
