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【单选题】
下图杆中，AB、BC、CD段的横截面面积分别为A、2A、3A，则三段杆的横截面上 。【图片】A.
轴力不等，应力相等；
B.
轴力相等，应力不等；
C.
轴力和应力都相等；
D.
轴力和应力都不相等。
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【单选题】Why was the octogenarian Barbara Crandell arrested?
A.
Because she refused to be intimidated by men wearing spiky shoes and pastel shirts.
B.
Because she has climbed the Observatory to pray for more than two decades.
C.
Because she refused to leave the top of the Observatory when the club officials showed up.
D.
Because she made her way to the top and stayed there for a long time, unwilling to leave.
【简答题】The Risks of Cigarette Smoke Discovered in the early 1800s and named nicotianine, the oily essence now called nicotine is the main active insredient of tobacco. Nicotine, however, is only a small comp...
【单选题】What does the news report say about Tu Youyou's discovery?
A.
It is indeed a novel therapy.
B.
It is a new treatment for cancer.
C.
It has saved many people's lives.
D.
It has found a fatal virus.
【单选题】A 36-year-old woman is brought to the psychiatrist by her husband because for the past 8 months she has refused to go out of the house, believ- ing that the neighbors are trying to harm her. She is af...
A.
Delusional disorder
B.
Schizophreniform disorder
C.
Schizoaffective disorder
D.
Schizophrenia
E.
Major depression with psychotic features
【单选题】近年来，科学家们认为掌握双语会对人的大脑产生深刻的影响，提高与语言无关的认知能力，甚至还能防止老年痴呆。长期以来，研究人员、教育工作者和决策者都认为第二语言是一种干扰。不过，研究人员现在发现，这种干扰与其说是障碍，倒不如说让使用者因祸得福。它迫使大脑去解决内部冲突，从而使大脑得到增强认知能力的锻炼。 根据上述文字推断，接下来作者最有可能讲述的内容是（）。
A.
使用双语对人类思维的重要意义
B.
两种语言系统的交流，可以消除两种文化之间的隔阂
C.
用实验结果验证双语者与使用一种语言的人在大脑活动上的差异
D.
人们认为第二语言是一种干扰，这其实是以往研究的误区
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