浸泡后水液呈橘红色,加酸变成橙色的中药材是()
A.西红花
B.苏木
C.秦皮
D.雄黄
E.红花
参考答案:B
电压瞬时值(V)的交变电流加在标有“220V,100W,用电流表测出的电流是_________,经过_________个周期电流做功为10J。
Why don't you want to see _____ birds in the new Bird Forest? [ ]
A. many kinds
B. different kinds
C. different kinds of
D. a lot kinds of