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问题 填空题
把8张卡片放人纸袋中，随意摸出一张，要使摸出数字“2”的可能性最大，数字“5” 的可能性最小，卡片上可以是什么数字？请你填一填。
        
答案

2

2

2

2

2

5

5

5

或

2

2

2

2

2

2

5

5

或

2

2

2

2

2

2

2

5

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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单项选择题

患者男性，33岁，发热、腹痛、腹泻3天，乏力，头晕一天，体检：T38℃，P 140次/分， BP 6/4kPa(50/30mmHg)，神志清，面部潮红，腋下有多个出血点。双肺正常，肝脾未触及。化验Hb 160g/L，WBC 38×109/L，杆状3％，中性82％，淋巴5％，异型淋巴细胞 12％，PLT 50×109/L，尿蛋白(+++)，镜检RBC 2～5/HP，最可能的诊断为

A．败血症

B．传染性单核细胞增多症

C．急性细菌性痢疾

D．流行性出血热

E．流行性脑脊髓膜炎(败血症休克型)
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