“第四纪（Quaternary）”一词是由谁率先使用的？
“第四纪（Quaternary）”一词是由谁率先使用的？
Proteins are natural polymers of amino acids with primary structure, secondary structure, tertiary structure and quaternary structure.
Proteins are natural polymers of amino acids with primary structure, secondary structure, tertiary structure and quaternary structure.
The β-sheet conformation of a protein can be considered an example of（） A: Primary structure B: Secondary structure C: Tertiary structure D: Quaternary structure
The β-sheet conformation of a protein can be considered an example of（） A: Primary structure B: Secondary structure C: Tertiary structure D: Quaternary structure
Hb的四个亚基形成的结构，属于蛋白质的 A: secondary structure B: Motif C: Domain D: quaternary structure
Hb的四个亚基形成的结构，属于蛋白质的 A: secondary structure B: Motif C: Domain D: quaternary structure
The spleen ( ) A: It is the extraperitoneal organ B: It is located in the right quaternary costal region C: Its long axis is consistent with the costal arch D: Diaphragmatic surface and diaphragm of the spleen.Diaphragmatic colon<br/>ligament contact
The spleen ( ) A: It is the extraperitoneal organ B: It is located in the right quaternary costal region C: Its long axis is consistent with the costal arch D: Diaphragmatic surface and diaphragm of the spleen.Diaphragmatic colon<br/>ligament contact
Plant growth regulators containing quaternary ammonium salts for rice. Ranai,A. (Daiichi Kogyo seiyakuco.Itd.) Jpn,kokai Tokkyo Koho JP0142404 (CL.A01N41/04) 14Feb.1989. 499该文献类型为专利文献。（ ）
Plant growth regulators containing quaternary ammonium salts for rice. Ranai,A. (Daiichi Kogyo seiyakuco.Itd.) Jpn,kokai Tokkyo Koho JP0142404 (CL.A01N41/04) 14Feb.1989. 499该文献类型为专利文献。（ ）