Clustered outbreak of COVID-19 refers to ( )
A: Two or more confirmed cases or asymptomatic infections within 7 days in a small area
B: Two or more confirmed cases within 14 days in a small area
C: Two or more confirmed cases or asymptomatic infections within 14 days in a small area
D: Two or more confirmed cases within 21 days in a small area
E: Two or more confirmed cases or asymptomatic infections within 21 days in a small area
A: Two or more confirmed cases or asymptomatic infections within 7 days in a small area
B: Two or more confirmed cases within 14 days in a small area
C: Two or more confirmed cases or asymptomatic infections within 14 days in a small area
D: Two or more confirmed cases within 21 days in a small area
E: Two or more confirmed cases or asymptomatic infections within 21 days in a small area
举一反三
- Within two days， the army fired more than two hundred rockets and missiles at military ________ in the coastal city.
- The video one borrowed must be returned ______. A: within a month B: within two weeks C: within one week D: within five days
- This product must be eaten .................... two days of purchase. A: by B: before C: within D: under
- In your simulation L/C, SHIPPING ADVICE must be emailed to buyer within two days after the date of shipment.
- As a legend goes, Shennong was once affected by 72 poisonous weeds within two days and he drank tea as the antidote.