玩是儿童的天性。然而,你可知道,天真的儿童还玩出了不少的发明创造,为人类的进步作出了伟大的贡献。 听诊器的发明 1816年,法国巴黎的市郊,有一群孩子正围着一堆木头玩耍,由一个人用大铁钉在木头的一端敲打,其余的在另一端把耳朵贴在木头上听。这时,勒内·雷奈克大夫路过这里,在孩子的招 Play is a child's nature. However, you can see that innocent children have also played a lot of inventions and made great contributions to the progress of mankind. The invention of a stethoscope In 1816, a group of children were playing around a pile of wood in the suburbs of Paris, France, one by one with big nails at one end of the wood and the other at the other end with ears on the wood. At this time, Rene Lenaq passed by the doctor in the child's move