短篇听写:什么是美?
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宇宙探秘:宇宙大爆炸(10)
大爆炸之前是什么呢?我们所见到的万物是怎么样从什么都没有变到这一切呢? These are only some of the most abstract and difficult concepts there are. So here's a mind-bender. What came before the ...
小故事:圣诞节
圣诞节来临之前,你最需要最想做的是什么呢!!!It was the Christmas season and the judge was in a merry mood as he asked the prisoner, "What is your offense?" "I did my Christmas shopping early t...
什么是CPR(2)
什么是CPR? 就是心肺复苏,什么?还不知道,那你赶紧看看下文吧The American Heart Association changed its guidelines for CPR chest presses in 2005. It said people should increase the number of chest...
什么是CPR(1)
什么是CPR? 就是心肺复苏,什么?还不知道,那你赶紧看看下文吧Cardiopulmonary resuscitation, or CPR, can save the life of someone whose heart has stopped. The condition is called cardiac arrest. Th...