基坑(槽)的施工,首先应进行房屋定位和标高引测,做好建筑物的放线工作。

题型:判断题

问题:

基坑(槽)的施工,首先应进行房屋定位和标高引测,做好建筑物的放线工作。

考点:施工员土建施工员土建施工员
题型:判断题

物体做初速度为零的匀加速直线运动,第1s内的位移大小为5m,则该物体(  )

A.3s内位移大小为45m

B.第3s内位移大小为25m

C.1s末速度的大小为5m/s

D.3s末速度的大小为30m/s

题型:判断题

石油库没有安全阀的容积泵的出口管道上应设置安全阀。()

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参考给定资料,围绕“民营企业的发展”这一主题,自选角度,自拟题目,写一篇议论文。 [要求] 观点明确,论证有力,语言流畅,字数1000字左右。

题型:判断题

神经细胞在静息时具有静息电位,受到适宜刺激时可迅速产生能传导的动作电位,这两种电位可通过仪器测量。A、B、C、D均为测量神经纤维静息电位示意图,其中正确的是()

A、选项A  

B、选项B  

C、选项C  

D、选项D

题型:判断题

That rapscallion who leaps off the monkey bars, landing smack onto an innocent 3-year-old bystander, and skips off, giggling all the while According to a new paper out of Israel, he may not feel all that bad about the incident. The study, conducted by Dr. In bal Kivenson Bar-On at the University of Haifa, shows that high levels of fearlessness in 3-and 4-year-olds is ply associated with aggression and a lack of sympathy. This news will likely surprise risk-loving America, where parents typically beam with pride when their undaunted child mounts the big slide.

Fearlessness is a far-end point on the spectrum of what psychologists call the "approach and withdrawal dimension"—people’s tendency to approach new stimuli (to gain information and acquire new skills ) and withdraw from unfamiliar stimuli (to avoid danger). Striking the right balance is considered crucial to man’s survival. But what about preschoolers’ There’s a clear downside, Dr. Kivenson Bar-On discovered, after she observed lots of preschool play and machinations. In total, she documented 80 children at preschool, home and in the lab, measuring their propensity for fearlessness and other social and emotional characteristics at the beginning and end of one year. Fearlessness was measured by observing reactions to various fright-inducing situations: separation from parents, the roar of a vacuum cleaner, a jack-in-the-box and the like. Those who displayed greater levels of fearlessness, the study found, had no trouble recognizing facial expressions of anger, surprise, happiness and sadness in other children—but they had a hard time identifying fear.

Over all, they were "emotionally shallow" and showed lower levels of sympathy. They took advantage of friends and lacked regret over inappropriate conduct. "These findings," the paper explains, " suggest that fearlessness in preschool constitutes a clear risk factor for developmental pathways that lead to problems in morality, conscience development, and severe antisocial behaviors. " At the same time, fearless children tended to be highly sociable. "One of the most interesting findings was that we could discriminate between friendliness and sympathy," Dr. Kivenson Bar-On said. "These kids are curious, easygoing and friendly, but they have a hard time recognizing emotional distress in others. "

Jamie Ostrov, a psychology professor at the State University at Buffalo who studies aggression, says that children at the extreme end of the fearless spectrurn "may be charming, but they’re also highly manipulative and deceptive and skilled at getting their way—even at age 3 or 4. " It could be that fearless children need per distress cues to active their autonomic nervous systems, limiting their ability to detect distress cues in others. It seems to be, if I’m not worried about this, you can’t be, either. But should we be

According to Dr. Kivenson Bar-On, fearless children()

A. have no sympathy

B. will have anti-social tendency

C. get well along with others

D. are foxy

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