×

×

<button class="btn btn-primary @(6)">Button</button> <button class="btn btn-primary @(6)">Button</button> <button class="btn btn-primary @(6)">Button</button> <button class="btn btn-primary @(6)">Button</button>

<button class="btn btn-primary btn-lg">Button</button> <button class="btn btn-primary btn-md">Button</button> <button class="btn btn-primary btn-sm">Button</button> <button class="btn btn-primary btn-xs">Button</button>

不正确

点击 这里 再试一次。

正确！

下一个 ❯