题型:填空题 —How ______ your trip to Nanjing?—Very wonderful. I ______ a great time there.[ ]A. was, had B. were, have C. were, had D. is, had 查看答案
题型:填空题 下列化合物在发生环上亲电取代反应时,活性由大到小排列正确的是()A.1,2,3-三甲苯>间二甲苯>对二甲苯>甲苯>苯B.间二甲苯>对二甲苯>1,2,3-三甲苯>甲苯>苯C.苯>甲苯>1,2,3-三甲苯>间二甲苯>对二甲苯D.甲苯>苯>1,2,3-三甲苯>间二甲苯>对二甲苯E.苯>甲苯>间二甲苯>对二甲苯>1,2,3-三甲苯 查看答案