连铸坯按铸坯断面分类有方坯、板坯、圆坯、异形坯。
参考答案：对
There ______ a number of people in the airport. The number of people who travel by plane ______ larger
than before. [ ]
A．are, are
B．are, is
C．is, is
D．is, are
全脊麻演变过程中哪一致命并发症最先发生（）
A.脉搏细弱
B.心跳骤停
C.意识消失
D.呼吸停止
E.血压下降
