Just in Time emphasizes the beneficial effect of reducing intemal and extemal lead times. ( )

CSS样式标签应该放置于HTML的什么标签内? A: body B: extemal file C: head

下面的XML片断中结构完整的是（）。 A: ＜customername=”＜xml＞.con”＞＜address＞123MainStreet＞＜/address＞＜/customer＞ B: ＜customer＞＜name＞Joe’sXMLWorks＜/name＞＜address＞NewYork＜/costomer＞ C: ＜customertype=extemal＞＜name＞PartnersUnlimited＜/name＞＜/customer＞ D: ＜customername=”JohnDoe”＞＜address＞123MainStreet＜/address＞＜zipcode=”01837”/＞＜/customer＞