A、when
B、so as
C、such that
D、though
更多“Generators should have an excitation/voltage regulation system which will enable them to share the steady state reactive load （） no machine exceeds its proportional share of reactive load by more than 10% of the rated reactive load of the largest generator.”相关的问题
A、To cut out generators when they are no longer required B、To cut in additional generators automatically as required C、To divide the KW load equally between generators operating in parallel D、To divide reactive current between generators operating in parallel
A、pKa－pH=log[A-]/[HA] B、pH－pKa=log[A-]/[HA] C、pKa－pH=log[A-][HA]/[HA] D、pKa－pH=log[HA]/[A-][HA]
A、Δhr与安装条件有关Δha与泵自身性能有关 B、Δhr取决外界条件，Δha取决泵本身因素 C、Δhr与泵制造工艺，材质等有关，而Δha与吸入条件及液体温度有关 D、两者所受影响相同，只是Δhr≥Δha
A、RNA由于分节段因而易于发生重组 B、HA、NA在包膜上易受化学因素的影响 C、HA、NA都是糖蛋白，化学性质不稳定 D、HA、NA和相应抗体结合导致变异 E、HA、NA抗原性容易发生变异
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