题目

下列离子方程式书写正确的是(    )A．碳酸氢钙溶液加到醋酸中:Ca(HCO3)2+2CH3COOH===CA2++2CH3COO-+2CO2á+2H2OB．FeI2溶液中通人少量的Cl2:2Fe2++CO2====2Fe3++2CL-C．饱和Fecl3溶液滴入沸水中Fe3++3H2OFe(OH)3(胶体)+3H+D．NaHCO3溶液中加入过量的Ba(OH)2溶液：2HCO3-+Ba2++2OH-====BaCO3â +2H2O+CO32-  答案：C解析: This morning, a boy of twelve saw a small fire at one end of a ship. Tom left home very early, against the wishes of his father, to see the ships at the port. It was a good thing that he did, because there was nobody else around, and the small fire grew dangerously big very soon.Tom stood near the ship and shouted at the top of his voice. He woke up the port workers living nearby.The ship was one of the six big ships in port at the time and they were all carrying oil（石油）and paper.The fire burned hundblacks of boxes of paper, so it spread very quickly. The end of the ship was black with smoke, but thanks to Tom, the fire didn't reach the oil.Tom was also lucky, because his father was pleased rather than angry with him.阅读短文，判断正误，正确的选A，错误的选B：【1】When Tom saw the fire, he was at the port【2】It was a small fire but it grew big very slowly.【3】The ship was carrying paper and wood .【4】As soon as the boy saw the fire, he shouted to wake up the workers nearby.【5】In this story the underlined word "against" means“违背”in Chinese.