A、<span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US"><em>z</em></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ">></span><i style="mso-bidi-font-style: normal"><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">z<sub>α</sub></span></i><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US"></span>
B、<span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US"><em>z</em></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: "><</span><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">-<i style="mso-bidi-font-style: normal">z<sub>α</sub></i></span>
C、<span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US"><em>z</em></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ">></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-font-kerning: 1.0pt; mso-bidi-font-family: \'Times New Roman\'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US"><sub> <shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f" /> <IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/54b7e422-efa0-4030-9efb-476cb71ba1c2.gif"title="ex_1257385129395_0.gif" alt="ex_1257385129395_0.gif"/> <stroke joinstyle="miter" /> <formulas /> <f eqn="if lineDrawn pixelLineWidth 0" /> <f eqn="sum @0 1 0" /> <f eqn="sum 0 0 @1" /> <f eqn="prod @2 1 2" /> <f eqn="prod @3 21600 pixelWidth" /> <f eqn="prod @3 21600 pixelHeight" /> <f eqn="sum @0 0 1" /> <f eqn="prod @6 1 2" /> <f eqn="prod @7 21600 pixelWidth" /> <f eqn="sum @8 21600 0" /> <f eqn="prod @7 21600 pixelHeight" /> <f eqn="sum @10 21600 0" /> <path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect" /> <lock v:ext="edit" aspectratio="t" /></sub></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-font-kerning: 1.0pt; mso-bidi-font-family: ">或</span><i style="mso-bidi-font-style: normal"><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">z</span></i><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: "><</span><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">-<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/54b7e422-efa0-4030-9efb-476cb71ba1c2.gif"title="ex_1257385129395_0.gif" alt="ex_1257385129395_0.gif"/></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-font-kerning: 1.0pt; mso-bidi-font-family: " lang="EN-US"><sub></sub></span>
D、<span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US"><em>z</em></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ">></span><i style="mso-bidi-font-style: normal"><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">z<sub>α</sub></span></i><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-font-kerning: 1.0pt; mso-bidi-font-family: ">或</span><i style="mso-bidi-font-style: normal"><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">z</span></i><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: "><</span><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">-<i style="mso-bidi-font-style: normal">z<sub>α</sub></i></span>
C、<span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US"><em>z</em></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ">></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US"><sub> <shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f" /> <IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/54b7e422-efa0-4030-9efb-476cb71ba1c2.gif"title="ex_1257385129395_0.gif" alt="ex_1257385129395_0.gif"/> <stroke joinstyle="miter" /> <formulas /> <f eqn="if lineDrawn pixelLineWidth 0" /> <f eqn="sum @0 1 0" /> <f eqn="sum 0 0 @1" /> <f eqn="prod @2 1 2" /> <f eqn="prod @3 21600 pixelWidth" /> <f eqn="prod @3 21600 pixelHeight" /> <f eqn="sum @0 0 1" /> <f eqn="prod @6 1 2" /> <f eqn="prod @7 21600 pixelWidth" /> <f eqn="sum @8 21600 0" /> <f eqn="prod @7 21600 pixelHeight" /> <f eqn="sum @10 21600 0" /> <path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect" /> <lock v:ext="edit" aspectratio="t" /></sub></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-font-kerning: 1.0pt; mso-bidi-font-family: ">或</span><i style="mso-bidi-font-style: normal"><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">z</span></i><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: "><</span><span style="FONT-FAMILY: ; FONT-SIZE: 12pt" lang="EN-US">-<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/54b7e422-efa0-4030-9efb-476cb71ba1c2.gif"title="ex_1257385129395_0.gif" alt="ex_1257385129395_0.gif"/></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-font-kerning: 1.0pt; mso-bidi-font-family: " lang="EN-US"><sub></sub></span>