说明：参考书为陶文铨老师的《数值传热学》第二版，吴志根编写，附带注释。
Reference books for the Tao Wenquan teacher' s " Numerical Heat Transfer, " Second Edition, Wu root preparation, with notes.
1939年9月1日， 矿山筛分设备德国联折斯洛伐克入侵波兰。两天后，英法两国正式向抵吴志宣战。
On 1 September 1939, Germany and Slovakia attacked Poland. On 3 September 1939, France and Britain declared war on Germany.
而同程旅游CEO吴志祥此前曾表示，出境游交易用户的获客成本在2000元左右，这也是行业平均水平。
The same way travel CEO Wu Zhixiang had previously said that outbound travel transaction users get the cost of about 2000 yuan, which is the industry average.
而同程旅游CEO吴志祥此前曾表示，出境游交易用户的获客成本在2000元左右，这也是行业平均水平。
The same way travel CEO Wu Zhixiang had previously said that outbound travel transaction users get the cost of about 2000 yuan, which is the industry average.
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