A-A+

Self-cleaning toilet bowls built on the lates

2022-08-01 21:22:05 问答库阅读 167 次

问题详情

Self-cleaning toilet bowls, built on the latest nanotechnology, are widely available in North America.
A．Y
B．N
C．NG

正确答案：C
解析：“Stunning Uses of Nanotechnology”小节部分第1段只提到self-cleaning toilet bowls的工作原理，并未提及其在北美的销售使用情况。