5.The occurrence of Avian Leukosis Virus-J Subgroup on the Commercial layer of Roman reported was the first time at home and abroad.
商品代罗发生禽J-亚群白血病报道在国内外尚属首次。
6.For electrical properties of MOS capacitors, the C-V curves were obtained by LCR meter (HP4284A), and picoampere meter (HP4140B) was used to measure the J-V curves.