综合布线区域内存在的电磁干扰场强高于()时,宜采用屏蔽布线系统进行防护。
A.1V/m
B.2V/m
C.3V/m
D.5V/m
参考答案:C
—Look! All the students are clapping with excitement. How nicely you sing!
—_________.
A.You are right
B.I don’t think so
C.Thank you
D.That’s all right
研究围岩蚀变有什么意义?