哪个校长只要犯了这样的错误都会被开除。Any head teacher who made errors like this would be chucked out.他是英格兰西部一所公学的校长。He was headmaster of a public school in the West of England.她对校长和教师们满心钦佩。She is full of admiration for the head and teache...
较好的配方是那些高硝基增塑的硝化棉粘合剂配方.The preferred compositions are the highly nitroplasticized nitrocellulose binder compositions.酞酸二丁酯一般用来作为这类增塑剂.Dibutyl phthalate is commonly employed as such a plasticizer.填料包括改性剂, 填充剂, 增塑剂和低摩擦添加剂....