下述哪项检查对明确诊断肝性脑病最有帮助（）
A.BUN
B.血氨
C.ALT
D.胆红素
E.血糖
参考答案：B
Which of the following will cause an increase in the demand for labor（）
A. An increase in the labor supply.
B. A decrease in labor productivity.
C. An increase in the demand for the final good or service.
薄胶皮两辊压延生产压缩空气压力不低于（）
A、0.8Mpa
B、0.6Mpa
C、0.5Mpa
D、0.7Mpa
