【单选题】在沥青胶中适当增加矿粉的掺量,能使其耐热性()。
【单选题】在沥青胶中增加矿粉的掺量,能使其耐热性 ___
【简答题】median incubation period
【单选题】在沥青胶中增加矿粉的掺量,能使其耐热性( )。
【单选题】A given street median is planted with trees. Of the 30 trees in the median, 3 are lindens, one-fifth are oaks, 12 are cedars, and the remainder are maples. What is the ratio of lindens to maples?
【单选题】若导游员同司机一起驱车前往组合旅游团游客分住的饭店接待他们时遇到途中堵车,导游员应将情况通知下一饭店 (),请其代告等车的游客延长等候时间