15.6-0.35×44，
=15.6-15.4，
=0.2；
故选：A．
一根烧红的铁钉，温度是500℃，质量是1.5g，它的温度降低到20℃，要放出多少热量？已知铁的比热容C铁=0.46×103J/（kg•℃）．
The data（）arrived just on time.
A．has
B．have
C．have been
D．has been
