下述哪种理解最正确( )
A．皮肤的病变均是表证
B．表证的病位不在脏腑
C．内脏的病变均无表证
D．符合表证特征为表证
参考答案：D
----______ you ever ________ Tom before ?
---- No, I _____ him just two minutes ago.
A．Did, know ; met
B．Have, known ; have met
C．Have, known; met
D．Did, know; had met
1000Ah容量的蓄电池，以500A电流放电，放电率是（）
A．1h
B．2h
C．3h
D．10h
