突发公共卫生事件可分为特别重大,重大、较大和一般四级,依次用红色、橙色、黄色和绿色进行预警。
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There is no one absolutely correct way to draw up a lesson plan and each teacher will decide what suits him or her best, but all good lesson plans give a clear picture of what the teacher intends to do in the lesson.()
A. 对
B. 错
马克思认为整治书报检查制度的真正而根本的办法,就是废除书报检查制度。
A. 对
B. 错
快门速度越快,感光胶片受光量越大。
A. 对
B. 错