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{{B}} High Stress May Damage
Memory{{/B}} According to a report issued in May 1998, elderly people who have consistently high blood levels of cortisol don’t score as well on memory tests as their peers with lower levels of the stress hormone. What’s more, high levels of cortisol are also associated with shrinking of the hippocampus, a region of the brain that plays a key role in learning and memory. The findings suggest that even cortisol levels in the normal, "healthy" range can actually accelerate brain aging. The study results "now provide substantial evidence that long-term exposure to adrenal stress hormones may promote hippocampal aging in normal elderly humans," write Nada Porter and Philip Land- field of the University of Kentucky in Lexington in their edito A. changes in the levels of adrenal hormones have nothing to do with brain aging. B. changes in the levels of adrenal hormones may affect brain aging. C. chronic stress may strengthen a man’s memory. D. the rate of brain aging always remains stable. [单项选择]夹板固定适应下列哪种股骨干骨折（）
A. 幼儿股骨干骨折 B. 老年人股骨干骨折 C. 4～8岁儿童股骨干骨折 D. 儿童及年老体弱稳定性股骨干骨折 E. 粉碎性不宜行手术的股骨干骨折 [多选题]CR400AF动车组轮对尺寸人工测量作业中对01、00车各条轮对尺寸进行人工测量主要有（）、制动盘磨耗、闸片磨耗并进行记录各部尺寸须符合限度要求。
A.轮径 B.内侧距 C.轮缘高度 D.轮缘厚度 [单选题]-B-001 5 2 3
第一类杠杆:当力支距大于重支距时( ),如果重力是一定的,那么力支距大于重支距几倍则省力几倍。反之,则费力几倍。 A.省力 B.费力 C.重力 D.用力 [T/] [单选题]在电子巡航控制系统中,CCS ECU根据驾驶员设定的车速和行驶阻力变化，自动调节（），使行驶车速保持恒定
A.喷油量 B.油门开度 C.自动变速器挡位 D.点火时刻 [单选题]1金融机构从业人员下列哪项活动是被允许的(.)
A.利用内幕信息买卖有相关关系的上市公司股票 B.挪用公款和客户资金买卖股票 C.利用自有资金买卖股票 D.用个人消费贷款(如住房.汽车贷款)买卖股票 我来回答: 提交
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