()组分的增加能大幅度提高石油沥青的粘度。
A.油分
B.树脂
C.石蜡
D.地沥青质
参考答案:D
19世纪末,刺激列强瓜分中国的事件是[ ]
A.《南京条约》的签订
B.《瑷珲条约》的签订
C.《北京条约》的签订
D.《马关条约》的签订
— I hear a traffic accident happened yesterday. Was it terrible?
— Yes. A car fell over and all the people in it were badly hurt. But luckily, of them were killed. [ ]
A. neither
B. none
C. every
D. both