A.3 W
B.6 W
C.12 W
D.15 W
答案:C
由,由,得=12 V,所以2A,,所以C正确。
a×18可以简写成a18______.
—would you like _____?
—No, thanks.[ ]
A. nothing else
B. else anything
C. something else
D. anything else