baths may also be ud.5.3For exposure to distilled or deionized water in the laboratory it may be convenient to u the apparatus shown in Fig.1.5.4For exposure to constant relative humidities,the sp
英语词汇教程I-chapter1-2Chapter 11. agreement 1.N-COUNT An agreement is a formal decision about future action that is made by two or more countries, groups, or people. 协议例:It looks as though a compromi ag