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问题 单项选择题

物业承接查验程序包括：①移交有关图纸资料；②确认现场查验结果；③查验共用部位、共用设施设备；④签订物业承接查验协议；⑤确定物业承接查验方案；⑥办理物业交接手续；⑦解决查验发生的问题。正确的程序排序为（）。

A.⑤①⑦③④②⑥

B.⑤①③⑦②④⑥

C.⑤①⑦④③②⑥

D.⑤③①⑦④②⑥

答案

参考答案：B

解答题

位于意大利中部比萨古城内的比萨斜塔高度是54.5米。世界公园里有一座比萨斜塔的模型，它的高度与原塔高度的比是1：10。这座模型高多少米？
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单项选择题

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．length

B．pair

C．size

D．space
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