第14题: [单项选择]酶的竞争性抑制剂具有下列哪种动力学效应() A. Vm不变,Km增大 B. Vm不变,Km减小 C. Vm增大,Km不变 D. Vm减小,Km不变 E. Vm增大,Km增大 参考答案:A 答案解析:酶促反应Vm不因有竞争性抑制剂的存在而改变,而竞争性抑制剂可使酶的表观Km增大。
第16题: [单项选择]From the last news we do NOT know ______. A. the results of the two matches B. the number of the teams which played last night C. how many wins the BBS has had altogether D. the Wingers has had one win and four defeats recently 参考答案:C 答案解析:本题考查细节信息。题中last和NOT know是关键词。首先阅读最后一条 news,并将其与各选项分别进行对照、分析,找出NOT know涉及的选项。A项关键词是two matches,原文中也确有