三个以上的表格嵌套样式有关问题（可以跨多列）

三个以上的表格嵌套样式问题（可以跨多列）

怎么让这个表格看上去像是一个表格上下对齐。

<div align="center">

        <table style="width: 90%;" border="1">

            <tr>

                <td>1</td>

                <td>2</td>

                <td>3</td>

                <td>4</td>

                <td>5</td>

            </tr>

            <tr>

                <td>01</td>

                <td colspan="4">

                    <table style="width: 100%;" border="1">

                        <tr>

                            <td>001</td>

                            <td>

                                <table style="width: 100%;" border="1">

                                    <tr>

                                        <td>000</td>

                                        <td>000</td>

                                        <td>000</td>

                                    </tr>

                                    <tr>

                                        <td>&nbsp;</td>

                                        <td>&nbsp;</td>

                                        <td>&nbsp;</td>

                                    </tr>

                                    <tr>

                                        <td>&nbsp;</td>

                                        <td>&nbsp;</td>

                                        <td>&nbsp;</td>

                                    </tr>