The specimens to be analyzed were taken _______.A、by accidentB、at randomC、on o

游客2023-09-06 46

问题 The specimens to be analyzed were taken _______.

选项 A、by accident
B、at random
C、on occasion
D、on average

答案 B

解析介词短语辨析。A．by accident偶然地，碰巧地；B．at random随机地，任意地；C．on occasion有时，必要时；D．on average平均，通常。根据句意应选B。句意为：要进行分析的样品是随机抽取的。

转载请注明原文地址:https://www.tihaiku.com/zcyy/2990852.html

相关试题推荐

随机试题

最新回复(0)

Whatisspecialabouttheman’sbirthday?[br][originaltext]Jill:Whatareyou