Explain why barium forms peroxide but beryllium does not.解释为什么钡能形成过氧化物而铍则不能。However the toxic properties of beryllium limit its application.然而铍的毒性限制了它的作用.Toxicity problem in manufacturing and storage might be alleviated ...
哈里继承了这座房子以及相当大的一片土地。Harry inherited the house and a sizeable chunk of land.除了胡安之外，每个人都获得了相当大的成功。With the exception of Juan, each attained a measure of success.生产成本相当大，达800万英镑。The production costs are a not inconsiderable...