I was told that my computer wasn’t powerful enough to run that _____.

A. 生地黄、玄参、牡丹皮、赤芍
B. 桑寄生、杜仲、怀牛膝、续断
C. 青蒿、白薇、地骨皮、桑白皮
D. 黄芩、黄连、黄柏、栀子
E. 金银花、穿心莲、贯众、重楼

A.维生素A
B.维生素B
C.维生素C
D.维生素D

String s1="bc";String s2="bc";?
A. 2
B. 1
C. 3
D. 0