The coach asked his staff to         the large group of journalists waiting for him to announce

his training plans. [ ]

A. adapt to

B. attend to

C. refer to

D. appeal to

热水采暖管道为了便于排水和放气，管道均设有坡度，一般室内管道的坡度为（）。

A、0.002

B、0.003

C、0.004

D、0.005