A.PB=PBS，Td=0.1Ts B.PB=1.2PBS，Td=0.3Ts C.PB=0.8PBS，Td=0.3Ts D.PB=0.8PBS，Td=0.1Ts
A.a+b B.a+c C.a+d D.a+b+c
A.flame retardant B.moisture resistant C.oil resistant D.low conductivity
A.≥0.01d＋2mm B.≥0.015d＋3.5mm C.≥0.02d＋5mm D.≥0.03d＋7.5mm
A．流阻大，使制冷劑閃氣 B．易被油和雜質(zhì)污染 C．增加粉末進(jìn)系統(tǒng)機(jī)會 D．使水分重新沖入系統(tǒng)
A.①②③ B.②③④ C.①③④ D.①②④
A.方向B.速度C.限度D.數(shù)量關(guān)系
A．兩個(gè)電容器的電壓之和等于電源電壓 B．每個(gè)電容器上的電壓值與其電容值成正比 C．等效電容為兩個(gè)電容之和 D．總電量Q為兩個(gè)電容器所帶電量之和
A.The expansion tank should be topped off B.The thermostatic water regulating valves should be manually opened C.The fuel filters should be changed D.The engine should be turned over slowly with the indicator cocks open
A.①+②+③+⑤ B.②+③+④+⑤ C.①+③+④+⑥ D.③+④+⑤+⑥
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