A.化學(xué)性質(zhì)穩(wěn)定B.受熱均勻C.價廉D.散熱慢E.制作方便
A.全草類B.根莖類C.礦物類D.貝殼類E.果實(shí)類
A.70%~90%B.80%~90%C.60%~80%D.50%~70%E.45%~65%