The most inefficient method of voltage reduction from the stand point of power loss, is a/an ()
A. capacitor in series with the load
B. inductor in series with the load
C. capacitor and inductor in series with the load
D. resistor in series with the load
思想政治教育是中国共产党在公安消防部队中进行的理论武装和()工作。
A. 交心谈心
B. 思想灌输
C. 思想引导
D. 拒腐防变
中年男性,上腹痛伴背部放射2年,钡餐检查未见异常,曾有数次黑便,诊断考虑()
A. 胰腺癌
B. 胃癌
C. 球后溃疡
D. 结肠癌
E. 胆道出血