After the epidemic infection of infectious diseases, specific immunity is obtained, which increases the immune population and reduces the susceptibility of the population.

When estimating population parameters, a point estimate is:? always equal to a population value.|a range of possible values for a population parameter.|the population mean.|a statistic that estimates a population parameter.

----What ______the population of China? --China has a population of around 1.4 billion. One-third of the population ______ workers here.

How to make a specific purpose specific and clear? A: express the specific purpose as a statement B: express the specific purpose as a question C: put the specific purpose as a full infinitive phrase D: put the specific purpose as a full declarative sentence

I don’t know ____ . A: what the population of Tianjin is B: what is the population of Tianjin C: how much the population in Tianjin is D: how much is the population in Tianjin

What _____ the population of China? One-third of the population _____ workers here.

----What ______the population of China?--China has a population of around 1.4 billion. One-third of the population ______ workers here. A: is; are B: are; are C: is; is D: are; is

Now our city has ____ of more than two million. A: the population B: a large population C: populations D: population

The population in China is very large, and eighty percent of the population in China (be) farmers.

Design clothing with a specific themefora specific purpose and market.