Which is wrong?（）. ["Dunnage is used to reduce broken space","Dunnage is used to benefit ventilation","Dunnage is used to segregate cargo","Dunnage is used to protect cargo"]
下列哪项不是渐变的类型（）。 ["线性渐变","角度渐变","扭曲渐变","菱形渐变"]
工业区位受原料产地影响的制约变小，是因为（） ["产品重量和体积增加","运输条件和生产工业的改进","产品价格提高","劳动力价格和产品需求下降"]
个人健康档案中的基本内容有（） ["生活习惯及嗜好","既往健康情况","心理健康状况","生活事件","以上都是"]
为什么要建立耐张段？
混凝土强度的检验评定方法一般包括什么？
