--- Bill! What about going to the theatre after work? The latest movie is on tonight.

--- Come on, Henry! ______ your silly talk and get down to business. Otherwise, we’ll never be finished for anything.

A．Cut out

B．Cut away

C．Cut through

D．Cut off

对流层中低纬暖，高纬冷，使空气在赤道（），极地（），在南北温差作用下，高空为（）吹向（）的南风；在气压梯度力的作用下，低层为（）吹向（）北风，构成直接热力环流圈。