浮力计算的普遍公式是 A. B. C. D. 答案:A 5.听第8段材料,回答第10至12题.10.What does the man think of his job?A.Boring. B.Relaxing. C.Interesting.11.What does the man do when he receives a tip?A.He rushes to report the news.B.He calls the police at once.C.He writes an article immediately.12.What will the speakers do next?A.Take a break.B.Continue the interviewC.Report the news together.