The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name. But Gregory Cochran is (1) to say it anyway. He is that (2) bird, a scientist who works independently (3) any institution. He helped popularize the idea that some diseases not (4) thought to have a bacterial cause were actually infections, which aroused much controversy when it was first suggested.
(5) he, however, might tremble at the (6) of what he is about to do. Together with another two scientists, he is publishing a paper which not only (7) that one group of humanity is more intelligent than the others, but explains the process that has brought this about. The group in (8) are a particular people originated from central Europe. The process is natural selection.
This group generally do well in IQ test, (9) 12-15 points above the (10) value of 100, and have contributed (11) to the intellectual and cultural life of the West, as the (12) of their elites, including several world-renowned scientists, (13) . They also suffer more often than most people from a number of nasty genetic diseases, such as breast cancer. These facts, (14) , have previously been thought unrelated. The former has been (15) to social effects, such as a p tradition of (16) education. The latter was seen as a (an) (17) of genetic isolation. Dr. Cochran suggests that the intelligence and diseases are intimately (18) . His argument is that the unusual history of these people has (19) them to unique evolutionary pressures that have resulted in this (20) state of affairs.
10（）
A.normal
B.common
C.mean
D.total
参考答案：C
解析：
[解题思路] 考查形容词。考查结构是形容词前置做定语修饰名词。100分的______值。 [A]表示“正常”；[B]表示“普通”；[C]表示“平均”；[D]表示“总和”。一般出现具体数值的比较都是与平均数字相比的，而本题难度在于大家在看到“100”这个具体数字时都期待着average这个选项的出现，却发现出题人没有提供，其实就是考查考生是否知道mean这个熟悉单词的不常见含义，表示“平均的”。