A.26℃ B.30℃ C.34℃ D.35℃
A. 10 B. 15 C. 20 D. 25
A.面积0.75m2,厚度为5mm B.面积0.6m2,厚度为3mm C.面积0.6m2,厚度为5mm D.面积0.75m2,厚度为3mm