第八章第二集.尝得到、看得见的演化

<p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica,Arial,sans-serif;hyphens:auto;text-align:justify;" data-flag="normal">文中文献：</p><p style="font-size:16px;line-height:30px;font-family:Helvetica, Arial, sans-serif;color:#333333;font-weight:normal;text-align:justify;" data-flag="normal">1.&nbsp;<br><img data-key="0" src="http://imagev2.xmcdn.com/storages/7f29-audiofreehighqps/42/E1/GKwRIMAFzoO2AAC1kgETHeaU.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" alt="" data-origin="http://imagev2.xmcdn.com/storages/7f29-audiofreehighqps/42/E1/GKwRIMAFzoO2AAC1kgETHeaU.jpg?op_type=0" data-large="http://imagev2.xmcdn.com/storages/7f29-audiofreehighqps/42/E1/GKwRIMAFzoO2AAC1kgETHeaU.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" data-large-width="750" data-large-height="327.56410256410254" data-preview="http://imagev2.xmcdn.com/storages/7f29-audiofreehighqps/42/E1/GKwRIMAFzoO2AAC1kgE...