A:细胞壁、细胞膜、液泡
B:细胞壁、液泡、叶绿体
C:细胞壁、细胞核、细胞质
D:细胞膜、细胞质、细胞核
红星队在4场足球赛中的成绩是:第一场3:1胜,第二场2:3负,第三场0:0平,第四场2:5负.红星队在4场比赛中总的净胜球数是多少?
I was told ________ twenty years ago, but it has changed a lot so far.