更多“中华文明之所以绵延数千年而不绝,中国社会之所以会有超____”相关的问题
余高造成了构件表面不平滑,在焊缝与母材的过渡处引起应力集中,对动载荷结构的疲劳强度()。
A.不利
B.有利
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速度继电器的电气文字符号是:( ) A . KA B . K S C . SB D . KM
A. KA B. K S C. SB D. KM
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增加财政收入的有效途径是( )
A.提高经济效益 B.提高价格水平 C.增加税收征管人员 D.提高预算管理水平
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一支40W日光灯的电感式镇流器消耗的有功功率约为()W。
A、1
B、2
C、4
D、8~10
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下列不属于区域性防突措施的有()
A.超前钻孔
B.开采保护层
C.预抽瓦斯
D.水力割缝
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现阶段,低碳经济的发展还处于从理念倡导、局部试验向全面实践推进的起步阶段。
A . 正确
B . 错误
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某化工仓库数间库房分别储存有电石、黄磷及少量煤油、苯、硫磺等物质, 回答下列问题:按储存物品的火灾危险性分类,该化工仓库属于()。
A.甲类 B.乙类 C.丙类 D.丁类
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线路纵断面图坡度栏中竖线为___的位置,两竖线间向上或向下的斜线分别表示上坡或下坡,平线表示平坡。
A.分界点
B.坡度长度
C.变坡点
D.坡率
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肩关节脱位常合并的骨折部位是()。
A.肱骨头
B.肱骨外科颈
C.肱骨大结节
D.肱骨小结节
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患者女,41岁,以发热20天,咳嗽咳痰伴气短3天,身高156cm,体重56kg患者2月前肾移植术后无明显诱因出现发热,体温波动在38.5℃左右,无发冷寒战,自服头孢类抗生素治疗近1周体温无明显下降,就...此患者初始治疗给予复方磺胺甲恶唑片3片的用药最可能的原因是()。
A.患者肾移植术后,肾功能较差,应选择以肝代谢为主的药物。
B.患者肾移植术后,应用药物较多,复方磺胺甲恶唑药物相互作用少。
C.患者肾移植术后,应用抗排斥反应的免疫抑制剂,属于免疫妥协人群,易感染卡氏肺孢子性肺炎,复方磺胺甲恶唑片可覆盖菌群。
D.患者院外应用抗菌药物,3个月内又住院病史,有耐药菌感染风险,复方磺胺甲恶唑片可覆盖耐药菌群。
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根据《锅炉定期检验规则》(TSG G7002—2015)的规定,锅炉内部检验时一般采用宏观检(抽)查、()、几何尺寸测量和理化检测等方法进行。
A.壁厚测量B.无损检测C.垢样分析D.强度校核
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Previous research by scientists from Keil University in Germany monitored Adelie penguins and noted that the birds" heart rates increased dramatically at the sight of a human as far as 30 meters away. But new research using an artificial egg, which is equipped to measure heart rates, disputes this. Scientists from the Scott Polar Research Institute at Cambridge say that a slow moving human who does not approach the nest too closely, is not perceived as a threat by penguins.The earlier findings have been used to partly explain the 20 per cent drop in populations of certain types of penguins near tourist sites. However, tour operators have continued to insist that their activities do not adversely affect wildlife in Antarctica, saying they encourage non-disruptive behavior in tourists, and that the decline in penguin numbers is caused by other factors.Amanda Nimon of the Scott Polar Research Institute spent three southern hemisphere summers at Cuverville Island in Antarctica studying penguin behavior towards humans. "A nesting penguin will react very differently to a person rapidly and closely approaching the nest," says Nimon. "First they exhibit large and prolonged heart rate changes and then they often flee the nest leaving it open for predators (捕食者) to fly in and remove eggs or chicks." The artificial egg, specially developed for the project, monitored both the parent who had been disturbed when the egg was placed in the nest and the other parent as they both took it in turns to guard the nest.However, Boris Culik, who monitored the Adelie penguins, believes that Nimon"s findings do not invalidate his own research. He points out that species behave differently—and Nimon"s work was with Gentoo penguins. Nimon and her colleagues believe that Culik"s research was methodologically flawed because the monitoring of penguins" responses entailed capturing and restraining the birds and fitting them with heart-rate transmitters. Therefore, argues Nimon, it would not be surprising if they became stressed on seeing a human subsequently.
A.penguins near tourist sites in Antarctica have been disrupted by the tourist activitiesB.penguin parents both take turn to guard their nest and look after their eggs or chicksC.penguins are not threatened by a human who approaches the nest slowly and distantlyD.penguins abandon the nest leaving eggs or chicks unprotected whenever seeing a human
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以下是进口药品批准文号的是
A. 国药准字J B. 国药准字H C. 进口药品注册证号 D. 医药产品注册证号
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按授权的对象,分为()和()。
A、普通授权
B、限额授权
C、强制授权
D、特殊授权
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期望防止问题的发生而不是等出现问题以后再补救的控制类型属于()
A.前馈控制 B.同期控制 C.反馈控制 D.直接控制
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