A:溶液呈中性,可选用甲基橙或酚酞做指示剂
B:溶液呈中性,只能选用石蕊做指示剂
C:溶液呈碱性,可选用甲基橙或酚酞做指示剂
D:溶液呈碱性,只能选用酚酞做指示剂
—It's so exciting that I _______ it twice.
Joe ____ (win) the race yesterday.
4472-38×72=( )