A、<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: " times="" new="" roman";="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"=""><em>XYZ</em></span>
B、<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: " times="" new="" roman";="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"=""><em>X</em></span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: " times="" new="" roman";="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="">+<i style="mso-bidi-font-style: normal">Y</i>+<i style="mso-bidi-font-style: normal">Z</i></span>
C、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/199e54b1-44ee-4225-9a4d-b23417511239.jpg"title="ex_1273738960399_0.jpg" alt="ex_1273738960399_0.jpg"/>
D、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/c8e000fb-d52b-4a37-9a54-e867fccefd19.jpg"title="ex_1273738967976_0.jpg" alt="ex_1273738967976_0.jpg"/>