中频电源电路的工作频率是()
A.几十~几百HZ
B.几kHZ
C.几十kHZ
D.几百kHZ
参考答案:B
Being both spoiled and lazy, he________everyone else for his lack of success.
A.accused
B.charged
C.criticized
D.blamed
杨某,男性,62岁,其运动后的最佳心率是
A.108次/分
B.120次/分
C.130次/分
D.140次/分
E.90次/分