衡量一个国家医疗卫生水平的重要指标是()
A.胎儿期死亡率
B.围生期死亡率
C.新生儿期死亡率
D.婴儿期死亡率
E.幼儿期死亡率
参考答案:B
—Can your brother dance?
—Yes, ______. [ ]
A. she can
B. he can
C. he can't
D. he doesn't
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