练习天数/课程天数：11/13
原材料引用（Material）：
This is the VOA Special English Health Report.
Cardiopulmonary resuscitation, or CPR, can save the life of someone whose heart has stopped. The condition is called cardiac arrest. The heart stops pumping blood. The person stops breathing. Without lifesaving measures, the brain starts to die within four to six minutes.
CPR combines breathing into the victim's mouth and repeated presses on the chest. CPR keeps blood and oxygen flowing to the heart and brain.
However, a new Japanese study questions the usefulness of mouth-to-mouth breathing.
The study was published in the British medical magazine,The Lancet.
信息和事实（Facts）：
(1) th位于词首时，可以从词性上判别其应有的读音。在名词、动词、形容词和数词中th发清辅音。如：thing, theatre, thunder, Thursday, theory, theme, think, thank, thirteen, thirty, third, thousand, 在代词和一些功能词中th发浊辅音.如： them, their, theirs, there, the, than, then, though, thus, therefore, they。只有介词through是个例外。
(2) th位于词尾（或音节之尾）时，其读音多数是清辅音，如：bath, breath, tooth, 等。只有在少数单词中，如：with, smooth 中读浊音。
(3) th在词中并且后面接er时，或者最后一个字母是不发音的e时，通常也发浊辅音。例如：feather, weather, whether, leather, further, father, bathe, breathe, southern, northern, either等。在其他情况下发清辅音。例如：author, faithful, method, nothing, anything, healthy, wealthy。
（以上内容来自百度）
感受与评价（Comments）：
学过的部分因为反复练习，已经比较熟练了，试了试还没有练习的部分，又被打回原形。所以还是得多练习，我猜想常用词都覆盖之后整个语音听起来就会好很多。所以还是没什么捷径，就是得多练习。
统计累计的练习小时数（Hours）：
25分钟/10小时40分钟
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