题目

阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。Devi looked through the observation window at the kids below, all waiting in line to get into the pool. She turned to her mother with an angry look on her face. “Mom, they're all little kids! This is ridiculous!”“I know, Devi,” replied her mother, “but you're a beginner, too, and you have to start somewhere!”Devi had never been to a swimming lesson in her life. Between schoolwork and helping on her grandfather's farm, she hadn't had time for lessons. The closest Devi had b 在某医院有这样一位病人，能感觉到右腿的伸和屈，左手碰到针尖能缩回，你认为该病人大脑皮层的神经中枢中肯定正常的是(     )①左半球运动中枢 ②左半球感觉中枢 ③右半球运动中枢 ④右半球感觉中枢A．①②B．①③C．①④D．②③