Young girls at high risk for depression appear to have a malfunctioning reward system in their brains, a new study suggests. The finding comes from research that (1) a high-risk group of 13 girls, aged 10 to 14, who were not depressed but had mothers who (2) recurrent depression and a low-risk group of 13 girls with no (3) or family history of depression. Both groups were given MRI brain (4) while completing a task that could (5) either reward or punishment.
(6) with girls in the low-risk group, those in the high-risk group had (7) neural responses during both anticipation and receipt of the reward. (8) , the high-risk girls showed no (9) in an area of the brain called the dorsal anterior cingulated cortex(背侧前扣带皮质), which is believed to play a role in (10) past experiences to assist learning.
The high-risk girls did have greater activation of this brain area (11) recei
A. repaired
B. impaired
C. healed
D. damaged
| The evolution of sex ratios has
produced, in most plants and animals with separate sexes, approximately equal
numbers of males and females. Why should this be so Two main kinds of answers
have been offered. One is couched in terms of advantage to population. It
is argued that the sex ratio will evolve so as to maximize the number of
meetings between individuals of the opposite sex. This is essentially a "group
selection" argument. The other, and in my view correct, type of answer was
first put forward by Fisher in 1930. This "genetic" argument starts from
the assumption that genes can influence the relative numbers of male and female
offspring produced, by an individual carrying the genes. That sex ratio
will be favored which maximizes the number of descendants an individual will
have and hence the number of gene copies transmitted A. developed by scientists with an interest in genetics B. useful in explaining some biological phenomena C. adopted by Hamilton in his research D. based on animal studies conducted prior to 1930 [简答题]简述老解放区教育对我国解放后教育管理的影响。
[单项选择]程序设计语言经历了（）。
A. 机器语言、汇编语言、高级语言等阶段 B. 机器语言、高级语言、人工智能语言等阶段 C. Foxpro、C、C++ D. DBase、Foxpro、VFP [多选题]LAD20033电力线路第一种工作票适用于( )。
A.在停电线路或在双回线路中的一回停电线路上的工作 B.在输电线路上需要全部或部分停电的配电变压器台架上、配电变压器室内的工作 C.箱变（包括置于风电机组内的变压器）本体需要停电的工作 D.箱变集电线路停电的工作。 [简答题]有一条高压线路供电给两台并列运行的电力变压器。高压线路采用LJ-70铝绞线，等距水平架设，相间距为1m，长2km。两变压器均为SL7-800／10型，总计算负荷为900kW，cosα=0．86，=4500h。试分别计算此电力变压器和高压线路的功率损耗和年电能损耗。
[单项选择]设备性能验收阶段，出现( )情况时，监理工程师不应签发设备初步验收证书。
A. 存在个别微小缺陷但不影响设备安全运行，供货方同意在限定时间内免费修理 B. 第一次性能验收试验表明几项性能指标未达到保证值，但属于采购方的使用原因 C. 第二次性能验收试验未达到保证值的几项缺陷，供贷方采取相应措施后达到保证值 D. 由于采购方生产运行的需要，在合同约定的期限内未能进行设备性能验收试验 [填空题]对学前儿童实施__________教育是我国学前教育的基本出发点，也是我国学前教育法规所规定的学前儿童教育的任务。
[单选题]作业前应（）前一天作业数据，正确输入当日探伤作业有关信息。
A.清空 B.下载 C.清空和下载 D.都不是 我来回答: 提交
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