题目

. ---How long are you going to stay in the country?    --- It’s hard to say. ______.    A. I don’t want to go there      B. It all depends    C. It doesn’t matter            D. That’s nothing 答案：B从细胞结构看“种瓜得瓜，种豆得豆”，这种现象主要取决于（ ）A.细胞壁 B.细胞核C.细胞质 D.细胞膜