相关疑难解决方法(0)

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
}

<div class="grid">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
  <div>6</div>
  <div>7</div>
  <div>8</div>
  <div>9</div>
</div>