Atributo“必需”nãofunciona

Question

蟒蛇皮！ 发行人的个人资料在哥伦比亚的流通数据中，在哥伦比亚的零售数据中，标记为“必需”的标记是：阿尔古萨·阿波罗>

<div class="row justify-content-center mb-5">
                <div class="col-sm-12 col-md-10 col-lg-8">
                    <form name="consulta" method="post">
                        <div class="form-row">
                            <div class="form-group col-sm-6">
                                <label for="escolhaDataIda">Escolha Data de Ida:</label>
                                <input type="date" id="escolhaDataIda" class="form-control" name="dataida" required>
                            </div>
                            <div class="form-group col-sm-6">
                                <label for="escolhaDataVolta">Escolha Data de Volta:</label>
                                <input type="date" id="escolhaDataVolta" class="form-control" name="datavolta"> 
                            </div>
                            <div class="form-group col-sm-12">
                                <a href="listaderesultados.html">
                                    <button type="button" class="btn btn-outline-dark btn-lg btn-block">Pesquisar</button>
                                </a> 
                            </div>
                        </div>
                    </form>
                </div>