某线路绝缘子测得盐密值为0.15mg/cm2，则该线路是Ⅲ级污秽区。
参考答案：对
After being．discovered by Dutch explorers in 1606，the eastern half of Australia_____by the British in 1770．
A．was claimed
B．claimed
C．was claiming
D．has been claimed
胸主动脉的分支是 ( )
A．肋间后动脉B．胸廓内动脉C．椎动脉D．头臂干E．甲状颈干
