已知：H2（g）+12O2（g）=H2O（l）△H=-285.8kJ•mol-1

定期清查一般在年末进行。（）

抗炎作用最强的药物是

A．氢化可的松

B．泼尼松

C．地塞米松

D．去炎松

E．氟氢可的松

经营与管理是否是同一个意思？

While trading on behalf of a pension account, an analyst receives special research reports from the brokerage firm with whom she is doing the trades. Such an activity is:（）

A. a violation of both Standard Ⅲ (A), Loyalty, Prudence, and Care, and the Code of Ethics.  B. a violation of only The Code of Ethics. 

C. not in itself a violation of Standard Ⅲ (A), Loyalty, Prudence, and Care, nor the Code of Ethics.

相位观测值中存在周跳，仅相当于观测值中存在于接收机观测噪声相当的偶然误差，无需修复。