题目

第三部分：阅读理解（共15小题，每题2分，满分30分） 阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。 A     Many people have described television as a passive activity that is harmful to children’s  education. However，there are good and bad ways to watch television．Parents who are interested in using television as a learning tool can actually turn time in front of TV into an educational chance．        Probably the most familiar educational way to use television is to sim下列反应能用Ca2++CO32-=CaCO3↓ 表示的是（　　）A．澄清石灰水中通入CO2B．Ca（NO3）2溶液和Na2CO3溶液混合C．CaCl2溶液和BaCO3D．澄清石灰水和Na2CO3溶液混合