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问题 单项选择题

在寿险公司确定汇率风险后，根据情况锁定其中的一部分风险，而对另一部分风险不采取措施。这种外汇风险管理的方案被称为（ ）方案。

A．不采取行动

B．锁定全部风险

C．有选择地控制风险

D．相机抉择

答案

参考答案：C

问答题

如图所示，物体A、B都处于静止状态，其质量分别为mA=5kg，mB=10kg，OB呈水平，OP与竖直方向成30°角．求物体B受到的摩擦力为多少？（g取10m/s2）
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单项选择题

Certificates are （） documents attesting to the （） of a public key to an individual or other entity. They allow verification of the claim that a given public key does in fact belong to a given individual. Certificates help prevent someone from using a phony key to （） someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a Certificate also contains an （） date, the name of the CA that issued the Certificate, a serial number, and perhaps other information. Most importantly, it contains the digital （） of the certificate issuer. The most widely accepted format for certificates is X.509, thus, Certificates can be read or written by any application complying with X.509.

to the （） of a public key to an individual or other entity.

A．connecting

B．binding

C．composing

D．conducting
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