在湿蒸汽区工作的动叶发生冲蚀现象的部位是进汽边背弧上,且叶顶部最为严重。
参考答案：对
She was so angry at all ______ I was doing ______ she walked out.
A．that; which
B．that; that
C．which; that
D．which; as to
最适当的治疗方法是
A．巴西尼(Bassini)法疝修补术B．麦克凡(McVay)法疝修补术C．疝成形术D．佛格逊(Ferguson)法疝修补术E．暂不宜手术
