In a public-key cryptosystem, (71) encrypted with the public key can only be deciphered with the private key from the same (72) . Conversely, (71) encrypted with the private key can be decrypted only with the public key. Users can make their public keys (73) available or place them at a key distribution center or others to access. However, the private key must be (74) safe. In public-key systems there’s no (75) to find a safe channel for communicating a shared secret key.

A．more

B．necessary

C．need

D．space

在运用市场法对土地使用权进行评估时，对交易情况进行修正时应考虑的因素包括（）。

A.有一定利害关系的主体之间的交易

B.有特别动机的交易

C.买方或卖方不了解市场行情的交易

D.交易时点

E.其他特殊交易情形