【单选题】When the presenter answers a question, he had better not __________.
A.
say that is a great question
B.
compliment the audience
C.
take time to think about the answer
【单选题】除了下列哪项外,都是醌类化合物所具有的理化性质
E.
多为有色晶体,颜色由黄、棕、红、橙、至紫红色
【多选题】根据脱墨方法分类,脱墨剂可以分为哪几种呢?
【单选题】霍奇金淋巴瘤最重要的具有诊断意义的病变是
【简答题】He had better take a bus there.(否定句) He had better_ _a bus there.