Geography 3 of the College Entrance Examination shows that immigrants from a certain country really don't understand this problem. I am stupid and analyze a lot. I don't quite understand. Ask for a de

Geography 3 of the College Entrance Examination shows that immigrants from a certain country really don't understand this problem. I am stupid and analyze a lot. I don't quite understand. Ask for a detailed answer Question 10 seems to have chosen A. From the picture:

From 19 10 to 1970, the total number of immigrants remained basically the same from 10 to150,000, while the proportion of one group to the total population decreased all the way. This shows that the total population is increasing from 19 10 to 1970. B.C.D is excluded because it does not meet this condition.

From the data of 1970 to 1990, we can see that both figures have increased, indicating that the population growth rate has slowed down.

According to the chart data. 1970 The number of immigrants was10 million, accounting for about 5% of the total population, and the calculated total population was 200 million (200 million); 190 The number of immigrants was 40 million, accounting for about 13% of the total population, and the calculated total population was 260 million. So the population also increased from 1970 to 1990.

1 1 Topic D is chosen because:

Question 10 choose a, you can directly look at the picture of a: 19 10 year, population near 1 100 million; The population of 1930 is about1300,000, increasing by 30 million from 19 10 to 1930. 1950,1500,000, 1930~ 1950, an increase of 20 million people. 1970 has a population of about 200 million, with an increase of 50 million people from 1950 to 1970. From 65438 to 0990, the total population was 260 million, an increase of 60 million.