流行性腮腺炎常用的外敷药物有（）
A.鲜马齿苋
B.鲜蒲公英
C.仙人掌
D.金黄散
E.青黛粉
参考答案：A, B, C, D, E
严重损伤后需及时处理的代谢变化是
A．呼吸性碱中毒
B．代谢性碱中毒
C．呼吸性酸中毒
D．代谢性酸中毒
E．混合性酸中毒
Which of the following types of unemployment is most likely caused by long-run changes that eliminate some jobs while generating others for which unemployed workers are not qualified（）
A. Frictional.
B. Structural.
C. Cyclical.
