下列哪项不是牛膝的禁忌证A．孕妇 B．滑精 C．痛经 D．便溏 E．崩漏

期货从业人员应当保守的秘密包括（）。

A.国家秘密

B.所在机构秘密

C.投资者的商业秘密及个人隐私

D.在执业过程中所获得的未公开的重要信息

Al-AgO电池可用作水下动力电源，其原理如图所示。该电池反应的化学方程式为：

2Al＋3 AgO＋2NaOH=2NaAlO₂＋3Ag＋H₂O，则下列说法正确的是 (    )

A．当电极上析出0.54 g Ag时，电路中转移的电子为0.01 mol

B．该隔膜是阳离子交换膜

C．Al电极的反应式为：Al－3e^－＋3OH^－=Al(OH)₃

D．正极的电极反应式为：AgO＋2e^－＋2H⁺=Ag＋H₂O

小明使用电烤箱1500W的档位烤制食品，设定烤箱工作时间为30min，那么这段时间共消耗的电能为___度。

决策过程中在()阶段，决策者综合权衡各种方案的优劣，从中选择一种方案。

A．信息收集

B．方案设计

C．方案评价

D．方案抉择

Certificates are (16) documents attesting to the (17) 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 (18) someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a certificate also contains an (19) date, the name of the CA that issued the certificate, a serial number, and perhaps other information. Most importantly, it contains the digital (20) 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.

A．text

B．data

C．digital

D．structured