lmno285
05-29-2011, 04:14 AM
Teacher: Here are two birds, one is a swallow, and the other is a sparrow. Now who can tell us which is which? Student: I cannot point out, but I know the answer. Teacher: Please tell us.vacuum extruder (http://www.143561.com/) Student: The swallow is beside the sparrow and the sparrow is beside the swallow.