简述采用DHCP的优缺点。

Sixteen years ago a boy gave me an important gift. 小题1:_________

It was the early autumn of my first year at a middle school, and my old school was far away. As a result, no one knew who I was. I was very lonely, and afraid to make friends with anyone.

Every time I heard the other students talking and laughing, I felt my heart break. 小题2:_________

Then one day, my classmates talked happily with their friends, but I sat at my desk unhappily as usual. At that moment, a boy entered the classroom. 小题3:_________he passed me and then turned back. He looked at me with a smile.

Suddenly, I felt the touch of something bright and friendly. It made me feel happy, lively and warm. 小题4:_________I started to talk with other students and made friends. Day by day, I became closer to everyone in my class. The boy with the lucky smile has become my best friend now.

One day I asked him why he smiled, but he couldn’t remember smiling at me! I t doesn’t matter because all the dark days have gone. 小题5:_________If you think it lonely, you might always be alone. So smile at world and it will smile back.

基金利息收入主要来源于（）等方面。

A.存出保证金

B.债券投资

C.结算备付金

D.银行存款

某儿童按国家计划免疫程序接种百白破疫苗后，接种局部出现轻度红肿、硬结，下列处理措施中正确的是（）。

A.冷敷，避免局部反应扩大

B.热敷，促进局部吸收

C.给予抗生素治疗

D.给予抗过敏治疗

E.给予激素治疗

患者，男性，40岁，因龋坏拔除，要求修复。

作后牙桩可选择的方案是（）

A．成品金属桩

B．间接法取模制作桩核

C．制作分瓣桩核蜡型做铸造桩核

D．以上均可

E．以上均不可

交流采样的特点是什么？综合自动化站中以保护和监控为目的的交流采样算法各是什么？