update select size in form

components/validation/demo/basic.md

@@ -170,7 +170,7 @@ var Form = React.createClass({
             <div className="col-12">
               <div className={this.renderValidateStyle('select', false)}>
                 <Validator rules={[{required: true, message: '请选择您的国籍'}]}>
-                  <Select style={{width:100 + "%"}} name="select" value={formData.select}>
+                  <Select size="large" placeholder="请选择国家" style={{width:"100%"}} name="select" value={formData.select}>
                     <Option value="china">中国</Option>
                     <Option value="use">美国</Option>
                     <Option value="japan">日本</Option>