能够检查整套保护装置动作信号与控制跳闸停机的准确性与可靠性的试验是（）。
A、甩负荷实现；
B、扰动试验；
C、开机试验。
参考答案：C
An analyst gathered the following information about a company: Net profit margin 5.0% Total asset turnover 2.0 Total assets/equity 2.5 Beta for the company's stock 1.5 Expected rate of return on the market index 10.0% Risk-free rate of return 5.0% The analyst expects the information above to accurately reflect the future. If the company wants to achieve a growth rate of at least 15% without changing its capital structure or issuing new equity, the maximum dividend payout ratio for the company would be closest to:（）
A. 0.0%.
B. 12.5%.
C. 40.0%.
患者女性，25岁，2周来发热，四肢关节酸痛，无皮疹。胸透示：两侧少量胸腔积液，查体：T39℃，P120次/分。双手掌指关节及膝关节轻度肿胀，血常规示：Hb100g/L，WBC3×109/L，PLT5×109/L，尿常规蛋白1g/L。
该患者最可能的诊断是
A．类风湿关节炎B．系统性红斑狼疮C．结核性胸膜炎D．病毒感染E．再生障碍性贫血
