下列关于非对称密码体制描述正确的是（）。

盐皮质激素的作用（）

A.使血钠升高

B.使血钾降低

C.两者均有

D.两者均无

E.降低血压

分布区域缩小、资源处于衰竭状态的野生药材是( )。

A．羚羊角
B．黄芩
C．天麻
D．丹参
E．甘草

An analyst makes the appropriate adjustments to the financial statements of retail companies that are lessees using a substantial number of operating leases. Compared to ratios computed from the unadjusted statements, the ratios computed from the adjusted statements would most likely be higher for:（）

A. the debt-equity ratio but not the interest coverage ratio.

B. the interest coverage ratio but not the debt-equity ratio.

C. both the debt-equity ratio and the interest coverage ratio.

By referring to Sam' s broken bicycle, the author intends to ______.

A．illustrate the ways to repair his bicycle

B．discuss the problems of his bicycle

C．tell us how to solve a problem

D．show us how to analyze a problem

机构投资者买卖双方直接联系成交的市场称之为（）。

A.店头市场

B.议价市场

C.公开市场

D.第四市场