【简答题】Fill in a suitable noun to complete each of the following sentences: 1. Can you describe the car? The police need a full __________ in order to find it.
【简答题】Fill in a suitable subordinator, or complex: ___________the button is pressed , the mine explodes.
【简答题】耦合剂的作用是:1防磨______;2将接触面之间的空______排挤掉,使超声波能顺利地入射到被测介质中。常用的耦合剂有:水、机______、甘油、水玻璃、胶水、化学浆糊等。
【简答题】Fill in a suitable adjective or adverb in its appropriate form in each blank. Rainy days are cold, but we have the _________ weather of all on clear, windy days in winter.