音频线缆的分布电容越大，其线缆阻抗值越大。( )
参考答案：错
红细胞的主要成分是()
A．血红蛋白
B．球蛋白
C．白蛋白
D．血红素
E．铁血红素
It is said that a grave of a middle aged man () about 2,300 BC was found by some English archaeologists in the year of 2002.
A．dating back
B．dated back to
C．dating back to
D．dated from
