第6题: [单项选择]Questions 19 to 21 are based on the conversation you have just heard.A. Take her business someplace else. B. Talk to the manager. C. Change her purchases. D. Open an account. 参考答案:D 答案解析:[解析] What will the woman probably do
参考答案:Because many people use them to improve their employment opportunities. 答案解析:注释:题目问的是:为什么大多数电视课程都具有职业教育性质 文章第三段最后一句提到:Because so many people use television learning to help them
第18题: [单项选择]下列结构中与牙齿周期性生长无关的是() A. 芮氏线 B. 埃布纳线 C. 欧文线 D. 牙面平行线 E. 施雷格线 参考答案:E 答案解析:芮氏线、牙面平行线与釉质周期性生长相关,埃布纳线、欧文线与牙本质周期性生长相关,施雷格线是一种由于规律性釉柱排列方向改变产生的折光现象。