第29题: [单项选择]What is the main purpose of the tour A. To inform visitors of the park’s history. B. To provide an overview of the park’s main attractions. C. To show visitors remote places in the park. D. To teach visitors how best to photograph wildlife. 参考答案:B 答案解析:[听力原文]11-13
Welcome to Everglade’s National Park. The Everglade is a watery plain covered with s
第35题: [单项选择]人体的腮腺是: A. 上皮组织 B. 复层扁平上皮 C. 腺上皮 D. 消化器官 参考答案:D 答案解析:[详解] 本题考查生物学知识。腮腺是人体的大唾液腺,它的结构是以腺上皮为主,此外还有其他的组织参与形成。所以腮腺是消化器官。人体的大唾液腺(腮腺、舌下腺、颌下腺)都是器官水平的腺体。人体的小唾液腺是组