我试图学习xpath。我在这里看了其他的contains()示例，但没有使用AND运算符。我不能得到这个工作：
//ul[@class='featureList' and contains(li,'Model')]
上：
...
<ul class="featureList">
<li><b>Type:</b> Clip Fan</li><li><b>Feature:</b> Air Moved: 65 ft.
Amps: 1.1
Clip: Grips any surface up to 1.63"
Plug: 3 prong grounded plug on heavy duty model
Usage: Garage,Workshop,Dorm,Work-out room,Deck,Office & more.</li><li><b>Speed Setting:</b> 2 speeds</li><li><b>Color:</b> Black</li><li><b>Power Consumption:</b> 62 W</li><li><b>Height:</b> 14.5"</li><li><b>Width:</b> Grill Diameter: 9.5"</li><li><b>Length:</b> 11.5"</li>
<li><b>Model #: </b>CR1-0081-06</li>
<li><b>Item #: </b>N82E16896817007</li>
<li><b>Return Policy: </b></li>
</ul>
...
