一匀质矩形薄板，在它静止时测得其长为a，宽为b，质量为m0．由此可算出其面积密度为(m_0)/(ab)．假定该薄板沿长度方向以接近光速的速度v作匀速直线运动，此时再测算该矩形薄板的面积密度则为( )A. ((m)_(0)sqrt(1-(frac(v)/(c))^2))(ab)B. ((m)_(0))/(absqrt(1-(frac(v){c))^2)}C. ((m)_(0))/(ab[1-(frac(v){c))^2]}D. ((m)_(0))/(ab[1-(frac(v){c))^2]^(3)/(2)}