45=4×35×3=1215,
45=4×95×9=3645,
45=4×85×8=3240=32÷40;
故答案为:15、36、40.
(6分)金属材料在生活、生产中应用十分广泛。
(1)下图A是金属的一个应用实例,请说出利用了金属的什么物理性质?(答出一点即可)
(2)右图B是两块金属片相互刻画后,在纯铜片上有明现的划痕。该实验探究的目的是什么?
---When did you move to Beijing? ---Last year. But I _____ in a school in Japan for 8 years.
A.has taught
B.taught
C.has been taught
D.has been teaching