以关元、三阴交、肝俞诸穴组成处方，可用于治疗

A．血枯经闭

B．月经先后无定期

C．月经后期

D．血滞经闭

E．痛经实证

Concerning the identification signal for a pilot vessel，in fog，which statement is TRUE?（）

A.When at anchor，the pilot vessel is only required to sound anchor signals

B.The identification signal must be sounded any time the pilot vessel is underway

C.The pilot vessel may only sound the identity signal when making way

D.All of the above