某分部工程由A、 B、 C、D成倍节拍流水，已知ta=2天，tb=4天，tc=2天，td

如图点S发出的光线经平面镜反射后过图中P点的光路图。

下列混合液中滴入Ba(OH)2溶液，立即产生白色沉淀的是

A．Mg(NO₃)₂ HCl NaCl

B．CuCl₂ NH₄NO₃ KCl

C．AlCl₃ HNO₃ CaCl₂

D．Na₂CO₃ KOH NaNO₃

Based on the AIMR Standards of Professional Conduct, which of the following statements is least likely to be a violation of Standard Ⅲ(D) , Prohibition against Misrepresentation（）

A. An analyst tells a prospective client that investment grade bonds involve less default risk than junk bonds. 

B. A bond trader tells a client that he can assist the client in all the client’s investment needs: equity, fixed income, and derivatives. 

C. An investment manager recommends to a prospective client an investment in mortgage IO strips because they are guaranteed by an agency of the federal government.

通风机的效率是指通风机的（）功率与输入功率之比。

以下属于医疗行为发生过程中的程序和手续不全的是（）

A.缺乏术前讨论，手术方式分析等

B.没有反映病人病情及其变化和医师处理情况的文字

C.医嘱执行记录不全

D.A＋C