note of 10/29/2018

Total Fertility Rate（TFR）
TFR: average number of children born per woman
for a population to remain the same, the TFR must be 2.1
higher than 2.1: population rises
lower than 2.1: population falls
World TFR : 2.42 (it was 2.54 two years ago, 2.47 last year)
US TFR : 2.01 ( it was 2.06 last year)
nigeria TFR : 6.89 (developing nation)
Japan TFR: 1.40 (developed nation, aging population)
OK, the first quarter is going to be finished this wednesday and I hope I can get a second honor at least. And I will do better and try to reach First honor in the second quarter. The other thing I heard is that Mr. schick's humangeo is the most difficult one and Mr.Fendryk's western civilization is the most difficult one and I meet both two. How lucky i am! we have a saying in China is difficult things make strong man. Hope I can enjoy the lessons in JC