The required compressive strength of PCC is measured at A: 3 days B: 7 days C: 14 days D: 28 days

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

(single choice) How long should measles patients with no complications be isolated? A: 10 days after the onset of rash B: 14 days after the onset of rash C: 7 days after the onset of rash D: 5 days after the onset of rash E: Until rash is completely subsided

Ryan Holmes did a(an) days digital detox. A: almost 14 B: complete14 C: almost 365 D: complete 365

The Chinese Centers for Disease Control and Prevention reports that signs of the virus may appear between two and 14 days after being near someone who is infected.

The secretary will contact you _____. A: for three days B: in three days C: about three days D: at three days

The entire project is scheduled to be completed within______. A: 784 days B: 748 days C: 478 days D: 487 days

The wedding ceremony of the Achang people lasts for _______. A: two days B: four days C: five days D: three days

-Good news. We will have a__holiday.-I've heard of it. But it's coming in____. A: three days; three days'time B: three days'; three days' C: three-day; three days D: three days; three-day time

The secretary will contact you _____. () A: for three days B: in three days C: about three days