题目

1-溴丙烷与2-氯丙烷分别和氢氧化钠的醇溶液混和加热,则A．产物相同                        B．有机反应类型相同C．碳氢键断裂的位置相同            D．有机产物不同 答案：B The kind teacher devoted all her time she had ___________ her students.A. help B. to help C. helping D. to helping