更多“古代儿童蒙养教材早期主要是识字教材。()”相关的问题
Racket, din clamor, noise, whatever you want to call it, unwanted sound is America"s most widespread nuisance. But noise is more than just a nuisance. It constitutes a real and present danger to people"s health. Day and night, at home, at work, and at play, noise can produce serious physical and psychological stress. No one is immune to this stress. Though we seem to adjust to noise by ignoring it, the ear, in fact, never closes and the body still responds—sometimes with extreme tension, as to a strange sound in the night.The annoyance we feel when faced with noise is the most common outward symptom of the stress building up inside us. Indeed, because irritability is so apparent, legislators have made public annoyance the basis of many noise abatement programs. The more subtle and more serious health hazards associated with stress caused by noise traditionally have been given much less attention. Nevertheless, when we are annoyed or made irritable by noise, we should consider these symptoms fair warning that other thing may be happening to us, some of which may be damaging to our health. Of many health hazards to noise, hearing loss is the most clearly observable and measurable by health professionals. The other hazards are harder to pin down. For many of us, there may be a risk that exposure to the stress of noise increases susceptibility to disease and infection. The more susceptible among us may experience noise as a complicating factor in heart problems and other diseases. Noise that causes annoyance and irritability in health persons may have serious consequences for these already ill in mind or body.Noise affects us throughout our lives. For example, there are indications of effects on the unborn child when mothers are exposed to industrial and environmental noise. During infancy and childhood, youngsters exposed to high noise levels may have trouble falling asleep and obtaining necessary amounts of rest.Why, then, is there not greater alarm about these dangers Perhaps it is because the link between noise and many disabilities or diseases has not yet been conclusively demonstrated. Perhaps it is because we tend to dismiss annoyance as a price to pay for living in the modern world. It may also be because we still think of hearing loss as only an occupational hazard.
A.unaffected byB.hurt byC.unlikely to be seen byD.unknown by
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如图所示平面,有两根螺旋位错012345和0’1’2’3’4’5’, ...
如图所示平面,有两根螺旋位错012345和0’1’2’3’4’5’, 图上所示的箭头方向为位错线的正方向。1).扭折位错线段是()。A. 12位错线段;B. 23位错线段;C. 1’2’ 位错线段; D. 2’3’ 位错线段 2). 割阶位错线段是()。A. 12位错线段;B. 23位错线段;C. 1’2’ 位错线段; D. 2’3’ 位错线段 3). 若图示滑移面为fcc的(111)面,这两根位错线段中,比较容易通过它们自身的滑移而消失的位错线段是()。A. 12位错线段;B. 23位错线段;C. 1’2’ 位错线段; D. 2’3’ 位错线段 4).随着位错线的滑移运动,产生空位的位错线段是()。A.12位错线段;B. 23位错线段;C. 1’2’ 位错线段; D. 2’3’ 位错线段 5). 对于位错反应:a[-101]/2+a[12-1]/6èa[-111]/3,说法不正确的是()。A. a[-101]/2是全位错的柏氏矢量; B. a[12-1]/6和a[-111]/3是不全位错的柏氏矢量; C. 反应能够进行; D. 反应后形成的Frank不全位错不能运动,是固定位错 则问题1-5的答案依次为()。A、1).a;2).c;3).a;4).c;5).cB、1).a;2).b;3).a;4).c;5).cC、1).a;2).c;3).b;4).c;5).cD、1).a;2).c;3).a;4).c;5).d
如图所示平面,有两根螺旋位错012345和0’1’2’3’4’5’, 图上所示的箭头方向为位错线的正方向。1).扭折位错线段是()。A. 12位错线段;B. 23位错线段;C. 1’2’ 位错线段; D. 2’3’ 位错线段 2). 割阶位错线段是()。A. 12位错线段;B. 23位错线段;C. 1’2’ 位错线段; D. 2’3’ 位错线段 3). 若图示滑移面为fcc的(111)面,这两根位错线段中,比较容易通过它们自身的滑移而消失的位错线段是()。A. 12位错线段;B. 23位错线段;C. 1’2’ 位错线段; D. 2’3’ 位错线段 4).随着位错线的滑移运动,产生空位的位错线段是()。A.12位错线段;B. 23位错线段;C. 1’2’ 位错线段; D. 2’3’ 位错线段 5). 对于位错反应:a[-101]/2+a[12-1]/6èa[-111]/3,说法不正确的是()。A. a[-101]/2是全位错的柏氏矢量; B. a[12-1]/6和a[-111]/3是不全位错的柏氏矢量; C. 反应能够进行; D. 反应后形成的Frank不全位错不能运动,是固定位错 则问题1-5的答案依次为()。
A、1).a;2).c;3).a;4).c;5).c
B、1).a;2).b;3).a;4).c;5).c
C、1).a;2).c;3).b;4).c;5).c
D、1).a;2).c;3).a;4).c;5).d
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独资企业既是会计主体,也是纳税主体。()
A.正确
B.错误
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单纯由于受压缩的液体或气体将容器胀破而发生的爆炸属于()。A.化学爆炸B.二次爆炸C.物理爆炸
单纯由于受压缩的液体或气体将容器胀破而发生的爆炸属于()。A.化学爆炸B.二次爆炸C.物理爆炸
A.化学爆炸B.二次爆炸C.物理爆炸
B.二次爆炸C.物理爆炸
C.物理爆炸
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患儿,男,14岁。双下肢水肿、蛋白尿2周,伴腹胀。实验室检查:24小时尿蛋白定量10g,血浆白蛋白18g/L,血胆固醇7.5mmoL/L,给予泼尼松50mg/d治疗2周后,蛋白尿转阴。最可能的病理诊断是
A.局灶节段性肾小球硬化B.系膜增生性肾炎C.膜性肾病D.微小病变肾病E.新月体性肾炎
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汽油机上用来加热进气空气和燃料与空气混合气的系统有()
A.加热空气进气控制 B.进气歧管加热控制 C.早期燃油蒸发(EFE)加热器 D.上面的3种
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在编写访问数据库的Java程序时,Connection对象的作用是
A.用来表示与数据库的连接
B.存储查询结果
C.在指定的连接中处理SQL语句
D.建立新数据库连接
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材料数量差异控制的重点是材料采购环节。()
材料数量差异控制的重点是材料采购环节。( )
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提示乙肝后期,HBV复制减弱,传染性降低的是()
A.HBsAg(+)、HBeAg(+)、抗HBc(-)、抗HBs(-)、抗HBe(-)
B.HBsAg(+)、HBeAg(+)、抗HBc(+)、抗HBs(-)、抗HBe(-)
C.HBsAg(+)、HBeAg(-)、抗HBc(+)、抗HBs(-)、抗HBe(+)
D.HBsAg(-)、HBeAg(-)、抗HBc(+)、抗HBs(+)、抗HBe(-)
E.HBsAg(-)、HBeAg(-)、抗HBc(+)、抗HBs(-)、抗HBe(-)
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检查钩尾框厚度应符合规定技术要求,磨耗到限时可堆焊处理()
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进行酸碱电位滴定时,通常用玻璃电极作指示电极,用下列电极作参比电极
A. 饱和甘汞电极B. 玻璃电极C. 银电极D. 铂电极
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