第28题: [简答题]Consider the survey evidence, which shows that while most Americans want to have both science and religion in their lives, they’ ll only go so far to preserve the former at the expense of the latter. 参考答案:
第29题: [单项选择]有关静脉瓣的描述正确的是()。 A. 多位于口径在2mm以上的静脉壁上 B. 是由内膜突向腔内折叠而成 C. 可以防止血液逆流 D. 大静脉辩的结缔组织内常有平滑肌纤维 E. 以上均是 参考答案:E