Nouns converted from adjectives have all the characteristics of noun and achieve
In the past two years, the teachers have devoted all their time to helping their
测定铅锡合金中Pb、Sn含量时,称取试样0.2000g,用盐酸溶解后,准确加入50.00mL 0.03000mol/L的EDTA,50mL水,加热煮沸2min,
A.B.C.D. A.B.C.D.