单选题
With this sensitive machine, we can find the ______ of a milligram of aspirin in an Olympic-size swimming pool.
A. counterpart B. equivalent C. average D. installation
A
B
C
D
【正确答案】
B
【答案解析】
counterpart：同等地位或作用的人或机构；equivalent：对应词，等量物，等价物；average：平均量；installation：安装
提交答案
关闭