调整

public/react/src/modules/courses/new/CoursesNew.js

@@ -412,7 +412,7 @@ class CoursesNew extends Component {
                                         })(
                                             <Select
                                             showSearch
-                                            className={"fl construction mr10 "}
+                                            className={"fl construction "}
                                             placeholder="例如：数据结构"
                                             // value={this.state.course}
                                             onSearch={this.handleSearch}