Yes you can. Just need to extends the template website_sale.cart
something like:

<template id="cart_instance" inherit_id="website_sale.cart" customize_show="True" name="Cart Inst">
    <xpath expr="//table[@id='cart_products']/thead/tr/th[1]" position="after">
        <th width="100">Unit of measure</th>
    </xpath>
    <xpath expr="//table[@id='cart_products']/tbody/t/tr/td[3]" position="after">
        <td>
            <span t-field="line.uom_id" style="white-space: nowrap;"/>
        </td>
    </xpath>
</template>