味精的主要成分是谷氨酸钠，具有解除大脑疲劳的作用。

世界上海洋与陆地的比例大约是[ ]

A．7：3

B．3：7

C．6：4

D．4：6

高血压联合用药的原则是（）

A.2级以上高血压，开始时应该采用联合治疗

B.第1～3天用第一种药物，第4天应加用第二种药物

C.同类的两种药物合用可以增效

D.为了有效，不论何种高血压，首先考虑两种药物合用

E.首先用两种不同类药物，如无效需加用第三种药物

Caleb Smith, CFA, is an investment advisor and manages the portfolios of several high-net-worth individuals. To comply with the Standards of Professional Conduct relating to suitability, at the inception of the client relationship, Smith must :（）

A. gather client information including the client's financial circumstances, personal data that are relevant to investment decisions, attitudes towards risk, and objectives in investing.

B. invest in a manner consistent with the stated mandate.

C. consider the possibilities of rapidly changing investment environments and their likely impact on a client's holdings.

设3阶方阵A的特征值是1，2，3，它们所对应的特征向量依次为α₁，α₂，α₃，令P=(3α₃，α₁，2α₂)，则P^-1AP=______。

A．

B．

C．

D．

“房抵贷”首笔用信前，须先审核是否办妥抵押登记手续，审核通过的，经营行办理用信审核审批。后续用信，经营行可直接进行用信审核审批。