在含n g HNO3的稀溶液里加入mg铁粉,铁完全溶解。假设有1/4g HNO3被还原,则n/m的值可能是 [ ]
A. 1:1
B. 2:1
C. 3:1
D. 4:1
CD
who plays the piano___, Linda, Lucy or Meimei?
Lucy. She often wins the prize in the piano competition.
A.good
B.fine
C.better
D.best
观叶树木