热阻
参考答案：
表征物体阻抗热传导能力大小的物理量。
A retailer sells 5 shirts. The first 2 he sells for $64 and $39. If the retailer wishes to sell the 5 shirts for an overall average price of over $50, what must be the minimum average price of the remaining 3 shirts ？（）
A. $49.00
B. $49.67
C. $50.00
D. $51.33
E. $55.50
为什么未成熟的果蔬显得脆硬？
