路面设计弯沉值是根据设计年限内每个车道通过的累计当量轴次、公路等级、面层和基层类型确定的，相当于路面竣工后第一年不利季节、路面在标准轴载作用下，测得的最大回弹弯沉值。
A、正确
B、错误

单项选择题对于产品是否有真实的需求的表达是区分真假客户的重要标准。 A、正确 B、错误

单项选择题What does the establishment of World Environment Day reflect?A. The longing and pursue of mankind for wealth. B. The longing and pursue of mankind for the good environment. C. The longing and pursue of mankind for peace. D. The longing and pursue of mankind for technology.