何谓“热盐环流”？何谓“风海流”？
参考答案：
温盐引起的环流称为热盐环流。由风驱动形成的海流称为风海流。
— You mean the position is still vacant?
— Yes, but you must know our job is very demanding.
— _____.[ ]
A. With pleasure
B. I don't mind
C. Don't mention it
D. That's all right
倒相式专业音箱的特点之一是提高了低频重放的下限频率。倒相式专业音箱的特点之一是提高了（）辐射的声压。
