The WHO decalared COVID-19 a pandemic.
The WHO decalared COVID-19 a pandemic.
The WHO decalared COVID-19 a pandemic. A: 正确 B: 错误
The WHO decalared COVID-19 a pandemic. A: 正确 B: 错误
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The WHO decalared COVID-19 a pandemic.
The WHO decalared COVID-19 a pandemic. A: 正确 B: 错误