用电信息采集系统从物理上可根据部署位置分为哪几部分？
参考答案：
主站、通信信道、采集设备等部分组成
血清酶检测对病毒性肝炎的诊断最为敏感和有意义的是（）
A.AST
B.AKP
C.ALT
D.γ-谷氨酰转肽酶
E.乳酸脱氢酶
The boy ______ his father. Sometimes people say they are brothers. [ ]
A. takes after
B. looks after
C. comes after
D. runs after
