补体就是溶血素,所以有补体参加的反应,可以发生溶血。
参考答案:错
— How about your journey to Guangzhou?
— Everything was quite okay except that our car____twice on the way. [ ]
A. broke down
B. turned down
C. let down
D. settled down
青岛啤酒和可口可乐是众所周知的产品,已处于成熟期,它的广告目标是()
A.通知广告
B.劝说广告
C.提示广告
D.电视广告