A. 0.139‰ B. 1.39% C. 1.39‰ D. 39.17%
A. performed B. served C. rebelled D. betrayed
A. with B. to C. on
A. 尼罗河是干流流经国家数量最多的河流 B. 伏尔加河是世界上最长的内流河 C. 亚马逊河是世界上水量最丰沛的河流 D。湄公河的上流在中国境内被称为澜沧江
A. neglected B. avoided C. emphasized D. admired