（36-37）
World Ranking of Countries by their Average IQ
Which country has the highest IQ? What is the average IQ of your country? Here are the top nine average IQ grades from many countries in the world. The numbers came from a work from 2002 to 2006 by Richard Lynn and Tatu Vanhanen. They did the IQ studies in more than eighty countries for many years.
In their studies, Richard and Tatu pointed out that the income of a country is related to their average intelligence quotient (IQ). They also found that the average IQs may be an important element ( but not the only one) to affect the wealth and economic growth of a country.

 rank排名 average平均 studies研究 point out 指出income收入related有相關的
element要素 affect 影響 wealth 財富economic growth 經濟成長

【題組】36.What can the intelligence quotient mean?
(A) How smart a person is.
(B) How many studies a person did.
(C) How much money a person makes.
(D) The economic growth of a country.