多项选择题 These terracotta sculptures were made with combined techniques of_____and_____, and were created first inparts and then assembled. A、mud B、modeling C、fire D、molding

问答题 5.Javascript中，如果已知html页面中的某标签对象的id=”username”，用（ ）方法获得该标签对象

单项选择题 当上或下极限偏差为零值时，在图样上（   ） A、必须标出零值 B、不用标出零值 C、标与不标零值皆可 D、视具体情况而定