Merge remote-tracking branch 'origin/PCqiandao' into PCqiandao

public/react/src/modules/courses/signin/teacher/Teachers_signin.js

@@ -245,7 +245,7 @@ class Students_signin extends Component{
 								<div className="ws100s" style={{
 									position: "relative"
 								}}>
-									<Tabs defaultActiveKey="1" onChange={this.callback}>
+									<Tabs activeKey={defaultActiveKey} onChange={this.callback}>
 										<TabPane tab="正在签到" key="1">
 											<p className="mt20 mysligtes">共{attendances_count}个签到正在进行</p>
 											<Teaccomponent