以下是引用mindfree在2004-10-5 5:18:00的发言: If you think C is correct, you might have misunderstood C. Here it does not matter whether the rice strain is high yield or low yield. If you thought C means the rice strain has potential to grwo more rice per acre, which is apparently a misunderstanding, the argument has said that "...nor will rice yields per acre increase appreciably"