题目内容
按照《突发事件应对法》的规定，自然灾害、事故灾难和公共卫生事件的预警级别可分为一级、二级、三级和四级，分别用()和蓝色标志。
A 红色、橙色、黄色
B 黑色、红色、黄色
C 红色、白色、黄色
D 黑色、橙色、白色
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正常人安静时，心率约在（）每分钟。
The Romantic period in the American literary history covers the time between the end of the ______century to the outbreak of the______. It started with the publication of Irving s______and ended with Whitman s ______ . This period is also called______.
Hester Prynne is the heroine in Hawthorne s novel______.
In American literature history, the Romantic Period, during which many famous writers and
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