练习篇：普通话韵母：ao测试练习

<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">ao发音要点</p><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"><img data-key="0" alt="" src="http://imagev2.xmcdn.com/storages/9bd0-audiofreehighqps/25/1F/CKwRIMAEgmQpAADXJQCwEG5n.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" data-origin="http://imagev2.xmcdn.com/storages/9bd0-audiofreehighqps/25/1F/CKwRIMAEgmQpAADXJQCwEG5n.jpg?op_type=0" data-preview-height="56.43598615916955" data-preview-width="140" data-preview="http://imagev2.xmcdn.com/storages/9bd0-audiofreehighqps/25/1F/CKwRIMAEgmQpAADXJQCwEG5n.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_small" data-large-height="302.33564013840833" data-large-width="750" data-large="http://imagev2.x...