[单项选择]Many IQ tests show that there are no significant differences in the mean, or average scores of IQ tests between men and women. When a new IQ test, is being constructed, it is quite easy to find test (51) that are not answered correctly (52) the same proportions of men and women, (53) these are usually then eliminated from the test. So, to some (54) the fact that no differences are to be found in our current IQ tests between the (55) for the two sexes is hardly surprising.
There are, (56) , differences in the standard deviations(偏差)or variability of the (57) of the two sexes in many IQ tests, (58) men showing the greater variation. The (59) of many IQ test scores are such (60) they approximate to the normal curve(正规曲线). If we regard some arbitrary lower score on a test as a classification like "educational subnormal(智力上逊常的人)" (ESN) and some equally arbitrary (61) score as "gifted", we then find that there
A. public
B. ordinary
C. commons
D. averages

[单项选择]Many IQ tests show that there are no significant differences in the mean, or average scores of IQ tests between men and women. When a new IQ test, is being constructed, it is quite easy to find test (51) that are not answered correctly (52) the same proportions of men and women, (53) these are usually then eliminated from the test. So, to some (54) the fact that no differences are to be found in our current IQ tests between the (55) for the two sexes is hardly surprising.
There are, (56) , differences in the standard deviations(偏差)or variability of the (57) of the two sexes in many IQ tests, (58) men showing the greater variation. The (59) of many IQ test scores are such (60) they approximate to the normal curve(正规曲线). If we regard some arbitrary lower score on a test as a classification like "educational subnormal(智力上逊常的人)" (ESN) and some equally arbitrary (61) score as "gifted", we then find that there
A. studies
B. numbers
C. scores
D. items

[单项选择]Both plants and animals of many sorts show remarkable changes in form, structure, growth habits, and even mode of reproduction in becoming adapted to different climatic environment, types of food supply, or mode of living. This divergence in response to evolution is commonly expressed by altering the form and function of some part or parts of the organism, the original identity of which is clearly discernible. For example, the creeping foot of the snail is seen in related marine preemptors to be modified into a flapping organ useful for swimming, and is changed into prehensile arms that bear sartorial disks in the squids and other cephalopods. The limbs of various mammals are modified according to several different modes of life—for swift running (cursorial) as in the horse and antelope, for swinging to several different modes of life—for swinging in trees (arboreal) as in the monkey, for digging ( fossorial ) as in the moles and gophers, for flying (volant) as in the bats, for swimmin
A. Adoptive Divergence
B. Evolution
C. Unusual Structures
D. Changes in Organs