单机无负荷试车调试应在调试前（）h将调试内容、时间、地点通知项目业主代表。
A.12
B.24
C.48
D.72
参考答案：C
Tom ' s brother _____ me _____ Tom just now.
A． make , to help
B．make , help
C． made , help
D．made, to help.
