A.450.6 B.575 C.603 D.805
A.10歐姆 B.10兆歐 C.110歐姆 D.110兆歐
A、切斷 B、關(guān)閉 C、阻止
A.真空度=絕對(duì)壓力+大氣壓力 B.真空度=絕對(duì)壓力-大氣壓力 C.真空度=大氣壓力-絕對(duì)壓力
A.0.2MPa B.0.25MPa C.0.3MPa D.0.35MPa