Which of the following description about the biologics is NOT right?

A、Biologicshavelargemolecularweight.;
B、Biologicsareheterogeneousatthemolecularlevelandcannotbepreciselydescribedbychemicalformula.;
C、Herceptinisabiologicdrug.;
D、Biologicscannotbesynthesizedinorganicchemistrylaboratory.;
E、Mostbiologicscanbetakenorally.