不管传热介质是否直接接触，传热量的大小与温度的四次方之差成正比，该传热方式为（）.

A.热传导

B.对流传热

C.辐射传热

D.导热

[配置路由器信息]
Current configuration：
!
hostname router1
isdn switch-type basic-net3 (1)
!
interface Ethernet0
ip address 10.0.0.1 255.255.255.0
ip nat inside (2)
!
interface bri 0
ip address negotiated (3)
ip nat outside
encapsulation PPP
PPP authentication pap callin (4)
PPP multlink (5)
dialer-group 1
dialer string 2633
PPP pap sent-username 263 password 263 (6)
ip route 0.0.0.0 0.0.0.0 bri 0
access-list 2 permit any (7)
dialer-list 1 protocol ip permit (8)
ip nat inside source list 2 interface bri 0 overload (9)
……
End