A.Huggins參數χ1可代表溶解熱
B.χ1=0.5時,高聚物溶液為理想溶液,溶解熱等于0
C.當高聚物和溫度選定后,χ1值越小說明溶劑越劣
D.當高聚物和溶劑選定后,溫度越高則χ1值越小
第1題
A、前導肽順利翻譯完成,意味著trpE等基因轉錄不能進行
B、核糖體停留在衰減子1區,23區莖環結構生成,34區終止信號就不能形成
C、前導肽的第10、11個氨基酸是色氨酸,對應的核苷酸序列為UGGUGG,如果通過基因突變技術將這6個核苷酸改造為非色氨酸密碼子,則RNA聚合酶不能再轉錄trpE等基因。
D、如果將前導肽基因的第12位氨基酸也改造為色氨酸密碼子,可能使細胞內鄰氨基苯甲酸合成酶的濃度增高
第7題
A.To suggest that theater was a major part of Russian culture in the twentieth century.
B.To establish the context in which Stanislavski developed his ideas about acting.
C.To explain why Stanislavski chose certain actors to study and analyze.
D.To describe the impact that Stanislavski's career had on Russian culture.
第8題
A.To suggest that theater was a major part of Russian culture in the twentieth century.
B.To establish the context in which Stanislavski developed his ideas about acting.
C.To explain why Stanislavski chose certain actors to study and analyze.
D.To describe the impact that Stanislavski"s career had on Russian culture.
第10題
A.general view.
B.subjective view.
C.macro view.
D.micro view.
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