人工光源就其发光原理可归纳为____、____和其他光源。
查看答案
表示光的基本物理量有____、____、照度和亮度等。
"Blackmal"istakenfromArthurHailey'snovelHotelwhichissetin_________________
Arkansas
B. NewOrleans
C. Texas
D. Mississippi
WhichofthefollowingbestdescribeshowtheDuchessfeltwhilewaitingforthe detective?
Anxious
B. Worried
C. Nervous
D. Fearful