A. live off B. live with C. live in D. live up to 参考答案:D 答案解析:live up to意为实践诺言、原则、信仰等或达到期望的标准 (reachtheexpectedstandard)。如:to live up to his promises(实践诺言),to liv
第24题: [单项选择]关于可兴奋细胞动作电位的描述,正确的是 A. 动作电位是细胞受刺激时出现的快速而不可逆的电位变化 B. 在动作电位的去极相,膜电位由内正外负变为外正内负 C. 动作电位的大小不随刺激强度和传导距离而改变 D. 动作电位的大小随刺激强度和传导距离而改变 E. 不同的细胞,动作电位的幅值都相同 参考答案:C
第31题: [填空题]Is the need for love to survive temporary 参考答案:No,it begins in infancy and continues throughout life./No,it is permanent and life-lasting one 答案解析:见第一段第三句话“The need is not a temporary one;it begins in infancy and continues throughout life.”,可知人类对爱