适用于高速公路、一级公路沥青下面层及以下层次,二级及二级公路以下公路的各个层次的沥青为()。
A.A级沥青
B.B级沥青
C.C级沥青
D.D级沥青
参考答案:B
This was but an additional testimony of the superiority of the socialist economic system over the capitalist economic system.
A.proof
B.witness
C.evidence
D.validity
在机场控制区内扰乱秩序,影响航班正常运行。