4. the distance between longest corners in the rectangle plastic sheet is 12, one of length is 8, the other edge is most closed to __. answer: 9
5. a 单独做每小时400ton, a 和 b 同时干了一件3000ton的事情用了2.5 小时,问b 的速度: 800
一到逻辑题是: frog 一般生活在temporary pools in the rain forests, but now most of rain forests are cleared to be replaced by pasture where contains many permanent pools, which provide better conditions for frogs, therefore, the cleaning of rain forests can not be of extinct.
Weaken: predators of frogs perfer to live in the permanent pools.作者: 珍妮小花 时间: 2011-12-22 19:27
谢谢楼主啊。。辛苦了。。作者: luluicecream 时间: 2011-12-22 19:53
谢谢楼主~