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【单选题】

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 es is hardly surprising.
There are, (56) , differences in the standard deviations(偏差)or variability of the (57) of the two es 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 is higher ratio of ESN males to women and likewise we (62) that there are more gifted men than women, even though the average scores are the same.
The (63) of men and women are known to differ somewhat in size, with women having about 200g less tissue () the other hand, they also tend to (65) less body mass, and over the phylogenetic(系统发育的)scale, the best index of species intelce is the ratio of body mass to brain size.

A.
required
B.
satisfied
C.
good
D.
high
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【单选题】已知常温下CH3COOH的电离平衡常数为Ka,常温下,向20mL0.1mol/L CH3COOH溶液中逐滴加入0.1mol/LNaOH溶液,其pH变化曲线如图所示(忽略温度变化)。下列说法中正确的是[ ]

A.
a点表示的溶液中由水电离出的H+浓度为1.0×10-3mol/L
B.
b点表示的溶液c(CH3COO-)<c(Na+)
C.
c点表示CH3COOH和NaOH恰好反应完全
D.
b、d点表示的溶液中相等

【单选题】DSC曲线中峰面积代表( )。

A.
热流率变化
B.
热量变化
C.
熵值变化
D.
温差

【单选题】氧解离曲线所反映的是

A.
血氧含量与大气02含量
B.
血氧容量与大气PO2
C.
血氧含量与血氧容量
D.
血氧饱和度与血PO2

【单选题】完全竞争市场的厂商供给曲线是指( )

A.
AVC>MC 中的那部分AVC曲线
B.
AC>MC中的那部分AC曲线
C.
MC≥AVC中的那部分MC曲线
D.
MC≥AC中的那部分MC曲线

【单选题】出生后小儿哪个系统发育最晚?(  )

A.
生殖系统
B.
神经系统
C.
运动系统
D.
淋巴系统
E.
消化系统