【单选题】When the prime movers of two paralleled generators are equipped with mechanical- hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will ...
【简答题】已知①25℃时,难溶电解质的溶度积常数:Ksp(CaC 2 O 4 )=2×10 -9 ,②25℃时,100 mL 0.4 mol·L -1 H 2 C 2 O 4 水溶液中,用KOH固体来调节溶液pH(忽略体积变化),得到H 2 C 2 O 4 、HC 2 O 4 - 、C 2 O 4 2- 三种微粒含量与溶液pH的变化关系如图所示。 请回答下列问题: (1) pH=5.2时,H 2 C 2 O...
【单选题】n December, 2014, the prime operating revenue of Company B was $500 000. At thesame time, its other operating revenue was $50 000 with $300 000 operating costs and $10 000other operating cost respecti...