in tg, thE struCturE thAt ContAins All thE unit AnD rElAtionships thAt ArE nECEssAry Fro intErprEting thE mEAning oF thE sEntEnCE is ______.
A．tEmporAry struCturE
B．DEEp struCturE
C．surFACE struCturE
D．syntACtiC struCturE