胆囊显影脂肪餐后,显示胆道较好的摄片时间为()
A.8~10min
B.10~15min
C.15~30min
D.30~45min
E.60~120min
参考答案:C
Tom enjoyed himself so much _____ he visited his best friend in Beijing last year.
A. that B which C. when D.where
B.甲的比热容比乙大
C.甲的内能比乙大
D.甲的温度比乙高