为QQ的电子邮件建立连接时，QQ的POP3的服务器是：（） A: Q B: CO C: CN D: Q E: COM F: POP3.Q G: COM H: smtp.Q I: COM

在域名www.qq.com中，其主机名是（）。 A: com B: qq.com C: qq D: www

【单选题】http://www.qq.com中顶级域名是？ A. www B. qq C. com D. http

对于主机域名v.qq.com.cn，其中表示主机名的是（）。 A: cn B: com C: qq D: v

The sum of the sensible heat and the latent heat of any substance is known as ________. A: total heat B: residual heat C: specific heat D: superheat

​The efficiency of a material in absorbing heat is described by heat capacity​

The red, orange and yellow lights contain ______. A: less heat than the other lights B: more heat than the other lights C: a great deal of heat D: a little heat

Potato A: A, love chilly and be afraid of heat B: B, love cold and be afraid of heat C: C, love heat and be afraid of cold D: D, love heat and be afraid of cold

The precipitation hardening processes include （） heat treatment and （） heat treatment.

Air preheater is a heat exchange device which uses the heat of flue gas to heat the air needed for combustion. () A: Right B: Wrong