砂的筛分析试验中包括（）仪器设备。
A.试验筛
B.天平
C.摇筛机
D.烘箱
E.浅盘、硬、软毛刷等
参考答案：A, B, C, D, E
The hormone glucagons(胰高血糖素) stimulates the breakdown of stored glycogen in liver and muscle cells by the following enzymes. Which is the first enzyme that must be activated ( )
A．Protein kinase A
B．Phosphorylase kinase
C．Glycogen phosphorylase
D．Protein phosphatase
E． Protein phosphatase inhibitor-1
提高冷原子荧光法测定汞的灵敏度的有效措施有那些？
