不能做加、减、乘、除等运算，一般只能计算频率和比例的（）。 ["定类指标","定序指标","定距指标","定比指标"]
《业下漫笔》一文主要抨击的是（） ["中国“固有精神”文明","帝国主义","资本主义","中国的奴隶制度"]
教学过程是由4个基本因素组成的，且各个因素在相互联系中发挥作用，缺一不可，这4个基本因素为（）。 ["教师、学员、管理人员、教学内容","教师、教室、管理人员、教学内容","教师、学员、教学设施、教学内容","教师、学员、教学内容、教学手段"]
艺术
The sl：shoppingList and sl：item tags output a shopping list to the response and are used as follows： 11.<sl：shoppingList> 12.<sl：item name="Bread" /> 13.<sl：item name="Milk" /> 14.<sl：item name="Eggs" /> 15.</sl：shoppingList> The tag handler for sl：shoppingList is ShoppingListTag and the tag handler for sl：item is ItemSimpleTag.ShoppingListTag extends BodyTagSupport and ItemSimpleTag extends SimpleTagSupport.Which is true？（） ["ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent（） and castingthe result to ShoppingListTag.","ShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren（） andcasting each to an ItemSimpleTag.","It is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy becauseone is a Simple tag and the other is a Classic tag.","ShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren（） on thePageContext and casting each to an ItemSimpleTag.","ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling findAncestorWithClass（）on the PageContext and casting the result to ShoppingListTag."]
发电机中性点采用何种接地方式？有何作用？
