thE titlE BElow thAt BEst ExprEssEs thE iDEAs oF this pAssAgE is ______.
A．thE importAnCE oF BAsiC rEsEArCh
B．roEntgEn's ignorAnCE oF x-rAys
C．thE AttrACtion oF AppliED sCiEnCE
D．BAsiC rEsEArCh vs. AppliED rEsEArCh