反映钢筋的塑性性能和变形能力的的指标是() A.屈服点 B.极限抗拉强度 C.屈强比

题型:单项选择题

问题:

反映钢筋的塑性性能和变形能力的的指标是()

A.屈服点

B.极限抗拉强度

C.屈强比

D.延伸率

考点:安全员安全员专业基础知识综合练习安全员专业基础知识综合练习题库
题型:单项选择题

某男68岁,牙列缺失,要求做全口义齿修复

依据选牙原则,若患者颌间距离较小,上下颌牙槽嵴较前突,全口义齿人工前牙应选择()

A.烤瓷牙

B.牙冠长的瓷牙

C.牙冠长的塑料牙

D.牙冠稍短的瓷牙

E.牙冠稍短的塑料牙

题型:单项选择题

They may be small and not able to speak, but babies are proving their amazing cleverness. Scientists began finding infants’ skills are more than they are supposed to be.

_________

Speaking of music, babies can’t seem to resist it. Not only are their ears turned to the beats, babies can actually dance to the music.

To test babies’ dancing ability, the researchers played recordings of classical music, rhythmic beats and speech to infants, and recorded the results. They also invited professional dancers to analyze how well the babies matched their movements to the music. The babies moved their arms, hands, legs feet and heads in response to the music, much more than to the speech. The finding suggests this dancing ability is innate(与生俱来的) in humans, though the researchers aren’t sure why it becomes weaker later in their life.

Learning Quickly while Sleeping

Babies can learn even while asleep, according to a 2011 study. In experiments with 26 sleeping infants, each just 1 to 2 days old, scientists played a musical tone followed by a puff of air to their eyes 200 times over the course of a half-hour. 124 electrodes(电极) stuck on the head and face of each baby recorded brain activity during the experiments. The babies rapidly learned to foretell a puff of air upon hearing the tone, showing a four-time increase on average in the chances of tightening their eyelids in response to the sound by the end of the experiments.

As newborns spend most of their time asleep, this newfound ability might be crucial to rapidly adapting to the world around them and help to ensure their survival, researchers said.

Judging Characters Well

Judging another person helpful or harmful is crucial when choosing friends. And that ability starts early. Kiley Hamlin of Yale University showed both 6-and 10-month-olds a puppet(木偶) show, in which one character helped another climb a hill. In another scene a third character pushed the climber down. The little ones then got to choose which character they preferred. For both age groups, most babies chose the helper character. This character-judging ability could be baby’s first step in the formation of morals, Hamlin thought.

小题1:Which of the following subtitles can fill in the underlined blank?

A.Dancing to Music

B.Babies’ Amazing Abilities

C.Learning to Dance Quickly

D.Born to Dance小题2:The underlined word “it” in the third paragraph refers to______.

A.the finding

B.the dancing ability

C.the response

D.the baby小题3:The experiment with 26 sleeping infants prove that_______.

A.babies can learn even while asleep

B.babies can respond to the world around them

C.babies can tighten their eyelids in response to the sound

D.babies can communicate with others while asleep小题4:In the last experiment, most babies chose the helper character, showing that________.

A.babies can judge a person helpful or harmful

B.babies love to see a puppet show

C.babies were born to help others

D.babes have learned to help others

题型:单项选择题

根据,DB31/329.16,某港口码头需安装摄像机,属于强制安装摄像机的场所是()。

A、港口、码头专用停车场(库)主要通道

B、计算机数据信息中心出入口

C、档案(资料)室出入口

D、有线广播室出入口

题型:单项选择题

与胁痛发病关系最为密切的脏腑是

A.心、肺

B.脾、胃

C.肝、胆

D.肝、肾

E.脾、肾

题型:单项选择题

“百人百样,千人千面”,这说明导游员在带团过程中要具备的组织技能是()。

A、合理引导游客审美

B、调整旅游活动的节奏

C、把握游客的个性差异

D、正确开展导购促销

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