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问题 单项选择题

某建筑公司于20×7年1月签订了一项总金额为900万元的固定造价合同，最初预计总成本为800万元。20×7年度实际发生成本700万元。20×7年12月31日，公司预计为完成合同尚需发生成本300万元。该合同的结果能够可靠估计。20×7年12月31日，该公司应确认的营业收入和资产减值损失分别为（）

A、630万元和30万元

B、600万元和30万元

C、630万元和100万元

D、700万元和100万元

答案

参考答案：A

多项选择题

脊柱骨质增生可见于（）

A.特发性肥大性骨关节病

B.强直性脊柱炎

C.脊柱结核愈合期

D.畸形性骨炎

E.脊柱外伤
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单项选择题

Public Key Infrastructure (PKI) service providers offer organizations fully integrated PKI-managed services designed to secure Intranet, Extranet, Virtual Private Network (VPN), and e-commerce applications. PKI solutions can enable a number of security services, including p authentication and non-repudiation of transactions.
eToken enables the users of PKI systems to generate and store (101) and digital certificates inside the token, creating a secure environment and allowing full portability and maximum ease of use. eToken Pro can also perform sensitive on-chip (102) operations, ensuring that users’ keys axe never exposed to the PC environment, eToken eliminates the need to store (103) and keys on a hard disk or browser file, or to transmit them across the Internet/Extranet; assuring peace-of-mind and confidence during online communications.
A digital signature is created using the private key of an individual to ensure the Validity of his request. This technology can be used to guarantee (104) of various transactions. The strength of either the authentication level or the digital signature relies on the level of protection offered to the private key. eToken Pro offers the maximum level of security, since it enables the use of the private key for signing and authenticating inside the eToken.
The most secure use of authentication involves enclosing at least one certificate with every signed message. The message (105) verifies the certificate using the CA’s public key. If the sender’s public key is legitimate, the recipient verifies the message’s signature. Digital signatures created with a private key are verified with the digital certificate containing the public key.

A．messages

B．certificates

C．applets

D．passwords
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