The magician picked several persons ________from the audience and asked them to help him with the performance.

A．by accident

B．at random

C．on occasion

D．on average

要求公务员有道德修养之心，也就是要有（）

A.善良之心

B.去邪除恶的勇敢之心

C.用权为民的服务之心

D.淡泊名利的平和之心