谜语:why is a river so rich?

谜语:why is a river so rich? why is a river so rich?iq题 why the river is so rich why is a river rich? 英语谜语:Why is a river rich?什么东东啊.乱起把早,哪位厉害点帮一西啊 Why is a river very rich? 英语脑筋急转弯：why is the river so rich? ? 2条英语谜语1 I can run but l can't walk.What am 2 Why is a river rich? Why is a math book sad?英语谜语 (脑筋急转弯)Why is a river rich?用汉语回答. Why do we say that a river is very why is a river rich到底是什么啊! Why is the river rich? 谁知道这些话的意思：1.Why is the river so rich?2.Which side of a hen has the most feathers?谁知道12、句的意思? 两个英语谜语...急 1.why is river rich?2.what letter stand for the ocean 多多指教咯~麻烦解释下给出这两个答案的原因.. 英语谜语答案1.letter is an insect?2.What is biack when it is clean and white when it is dirty?3.What will you get if you cut the head of a bear?4.why is a river rich? why is a math book sad 谜语我知道意思是：为什么数学本子很伤心? So why is that