用牛奶瓶培养黑腹果蝇，观察成虫数量的变化，结果如下表： <table border="1" cellspacing="0" cellpadding="0" _dj="MsoTableGrid"><tbody><tr><td width="91">时间（天）</td><td width="48">1</td><td width="36">5</td><td width="35">9</td><td width="51">13</td><td width="51">17</td><td width="51">21</td><td width="51">25</td><td width="51">29</td><td width="51">33</td><td width="51">37</td></tr><tr><td width="91">成虫数（只）</td><td width="48">6</td><td width="36">10</td><td width="35">28</td><td width="51">71</td><td width="51">131</td><td width="51">207</td><td width="51">270</td><td width="51">302</td><td width="51">327</td><td width="51">341</td></tr></tbody></table>根据表中数据分析，下列结果正确的是