单项选择题
A.1 B.2 C.3 D.无要求
A.15B.30C.45D.60
A.低速搅拌60s,停30s,高速搅拌150s,停机 B.高速搅拌60s,停30s,低速搅拌150s,停机 C.高速搅拌120s,停15s,低速搅拌120s,停机 D.低速搅拌120s,停15s,高速搅拌120s,停机
A.32.5 B.42.5 C.52.5 D.62.5
微信扫一扫,加关注免费搜题