None of these materials______conductors.A、isB、areC、had beenD、wereB

游客2024-10-26 19

问题 None of these materials______conductors.

选项 A、is
B、are
C、had been
D、were

答案 B

解析

转载请注明原文地址:https://tihaiku.com/zcyy/3818470.html

相关试题推荐

随机试题

最新回复(0)