(2007年)根据斯蒂芬一玻尔兹曼定律,面积为2m2、温度为300℃的黑体表面的辐射力为()W/m2。
A.11632
B.6112
C.459
D.918
听力原文:M: May I cash these traveler's checks for $300 here?
W: Of course. Would you please countersign them here? Also write place and date as specified.
Q: What does the man want to do according to the conversation?
(16)
A.To endorse his cheques.
B.To show his passport.
C.To cash some traveler' s cheques.
D.To open a checking account.
A.100
B.200
C.300
D.500
A.so well
B.returned
C.to the salad bar
D.another helping