题目

第三部分：阅读理解（共两节 第一节20小题，每小题2分，第二节5小题，每小题1分,满分45分） 阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项 Hunting with birds is a very old sport. In some countries the golden eagle is used for hunting wild animals. They are used for hunting foxes and wolves. Training an eagle to hunt takes a long time. Hunters catch young eagles in nets made of hair. After being trained the eagle is taken to a field. A blindfold over the bird’s eyes keeps it quiet until the hunter is ready. The eagle sits 用NA表示阿伏加德罗常数的值，下列说法正确的是（　　） A、1mol甲醇中含有C-H键的数目为4NAB、常温下，2.24LCl2完全与NaOH溶液反应，转移的电子数目一定为0.1 NAC、7.8g由Na2S和Na2O2组成的混合物中含有阴离子的数目为 0.1NAD、80℃时，pH=13的1.0LBa（OH）2溶液中含有的OH-数目为0.2 NA