练习篇：普通话韵母：ei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">韵母ei练习要点</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/2f79-audiofreehighqps/42/38/CMCoOSMEe_0EAADANQCt4Ihg.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" data-origin="http://imagev2.xmcdn.com/storages/2f79-audiofreehighqps/42/38/CMCoOSMEe_0EAADANQCt4Ihg.jpg?op_type=0" data-preview-height="58.99827288428325" data-preview-width="140" data-preview="http://imagev2.xmcdn.com/storages/2f79-audiofreehighqps/42/38/CMCoOSMEe_0EAADANQCt4Ihg.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_small" data-large-height="316.0621761658031" data-large-width="750" data-large="http://imagev2....