问题
单项选择题 A2型题
观察期内,可能发生某病的一定人群中,新发生某病的频率指的是()
A.发病率
B.患病率
C.某病病死率
D.某病死亡率
E.治愈率
答案
参考答案:A
观察期内,可能发生某病的一定人群中,新发生某病的频率指的是()
A.发病率
B.患病率
C.某病病死率
D.某病死亡率
E.治愈率
参考答案:A
It’s Charlie’s birthday today, but he isn’t feeling happy. No one wishes him a happy birthday. Mother says nothing about his birthday. She just tells Charlie to play outside. At lunchtime, his mother calls, “Come in for lunch, Charlie!” Charlie slowly walks into his house. But the living room looks different. Charlie sees a big “Happy Birthday” banner(横幅). Then, he sees a birthday cake, balloons, presents, and all of his friends. “Happy birthday!” everyone shouts. Charlie’s face lights up. He is happy and surprised(吃惊). No one forgets his birthday after all! 小题1:What is this story about?
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