A.130mm B.150mm C.158mm D.190mm
A.小于2KPa B.小于3KPa C.小于4KPa
A.只读存储 B.只读光盘 C.只读硬盘 D.只读大容量软盘
A.碳氢 B.氧氢 C.碳氧 D.氢氧
A.20mg/m3 B.10mg/m3 C.2mg/m3 D.1mg/m3
