非对称密码体制也称公钥密码体制,即其所有的密钥都是公开的。
参考答案:错
188. The truck is carrying a _____of bananas. All these will be sent to the north of China.
A.loaf
B.lid
C.load
D.Burdens
牙鲆弹状病毒对热不稳定,加热达到()时病毒即可失去活性
A.50℃2min
B.20℃30min
C.20℃50min
D.50℃lmin