Shape-memory effect(SME) is the ability of a material to change its dimension in a predefined way in response to an exte......

A series of cross-linked polyether?polyester polyurethane dispersions modified with organosiloxane were prepared based o......

本文对１３０具有正常男性童尸，按其身长分为６个年龄组，对生殖系统作了，主要结果：（１）睾丸呈卵圆形者占９４．６２％。（２）在新生儿组中附睾与睾之间的位置关系不一......