A、h1{background-color:#FFFFFF} B、h1{background-color:#FFFFFF;} C、h1.all{background-color:#FFFFFF} D、#h1{background-color:#FFFFFF}
A、h1{background-color:#FFFFFF} B、h1{background-color:#FFFFFF;} C、h1.all{background-color:#FFFFFF} D、#h1{background-color:#FFFFFF}
A、h1 {background-color:#FFFFFF} B、h1 {background-color:#FFFFFF;} C、h1.all {background-color:#FFFFFF} D、#h1 {background-color:#FFFFFF}
A、all.h1 {background-color:#FFFFFF} B、h1 {background-color:#FFFFFF} C、h1.all {background-color:#FFFFFF} D、h1#all {background-color:#FFFFFF}
A、background-image B、background-color C、background-position D、background-repeat
A、background-position B、background-color C、background-image D、background-size
A、A.background-color B、B.bgcolor C、C.color D、D.backgroundcolor
["800color: rgb(51, 51, 51); text-transform: none; text-indent: 0px; letter-spacing: normal; font-family: arial, 宋体, sans-serif; font-size: 12px; font-style: normal; font-weight: normal; word-spacing: 0px; float: none; display: inline !important; white-space: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;\">°C<\/span>-1000color: rgb(51, 51, 51); text-transform: none; text-indent: 0px; letter-spacing: normal; font-family: arial, 宋体, sans-serif; font-size: 12px; font-style: normal; font-weight: normal; word-spacing: 0px; float: none; display: inline !important; white-space: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;\">°C<\/span>","1100color: rgb(51, 51, 51); text-transform: none; text-indent: 0px; letter-spacing: normal; font-family: arial, 宋体, sans-serif; font-size: 12px; font-style: normal; font-weight: normal; word-spacing: 0px; float: none; display: inline !important; white-space: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;\">°C<\/span>-1250color: rgb(51, 51, 51); text-transform: none; text-indent: 0px; letter-spacing: normal; font-family: arial, 宋体, sans-serif; font-size: 12px; font-style: normal; font-weight: normal; word-spacing: 0px; float: none; display: inline !important; white-space: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style:
A、观察法 B、重点团队分析 C、问卷调查法 D、工作任务分析法<br style="font: 14px/21px Tahoma, "Microsoft Yahei", Simsun; color: rgb(68, 68, 68); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; word-wrap: break-word; widows: 1; font-size-adjust: none; font-stretch: normal; background-color: rgb(255, 255, 255); -webkit-text-stroke-width: 0px;" /> <br style="font: 14px/21px Tahoma, "Microsoft Yahei", Simsun; color: rgb(68, 68, 68); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; word-wrap: break-word; widows: 1; font-size-adjust: none; font-stretch: normal; background-color: rgb(255, 255, 255); -webkit-text-stroke-width: 0px;" />