更多“清代李时珍编著《本草纲目》载药1892种。”相关的问题
PSM参数（Active Time value for PSM）的取值越（），终端越快进入PSM省电状态。
A.小
B.大
C.与取值无关
D.无
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测得某六边形内角和为720°00’54"，则内角和的真误差和每个角的改正数分别为：（）
A.+54、+9 B.-54、+9 C.+54、-9 D.-54、-9
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石墨化有哪两种常见类型？（）
A.随机石墨化
B.交叉石墨化
C.球状石墨链状分布
D.平面石墨化
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Hydrothermal vents along the mid-ocean ridges host ephemeral ecosystems of diverse fauna, including several crustacean species, some of which undergo development as larvae up to 1,000 meters above and 100 kilometers away from the vents. For example, vent crab Bythograea thermydron (at stage of larvae) possess image-forming compound eyes with a visual pigment sensitive to the blue light of upper oceanic waters. As these larvae metamorphose into adulthood and begin to descend to and settle at the vents, they lose their imageforming optics and develop highsensitivity naked-retina eyes. With maturation,the spectral absorbance of the visual pigment in these eyes also shifts towards longer wavelengths and this progressive visual metamorphosis trades imaging for increased sensitivity, and changes spectral sensitivity to the dim, longer wavelengths of light existing at the bottom of the ocean. As hydrothermal vents produce light, vision may supplement thermal and chemical senses to orient post-larval settlement at vent sites.
Hydrothermal vents along the mid-ocean ridges host ephemeral ecosystems of diverse fauna, including several crustacean species, some of which undergo development as larvae up to 1,000 meters above and 100 kilometers away from the vents. For example, vent crab Bythograea thermydron (at stage of larvae) possess image-forming compound eyes with a visual pigment sensitive to the blue light of upper oceanic waters. As these larvae metamorphose into adulthood and begin to descend to and settle at the vents, they lose their imageforming optics and develop highsensitivity naked-retina eyes. With maturation,the spectral absorbance of the visual pigment in these eyes also shifts towards longer wavelengths and this progressive visual metamorphosis trades imaging for increased sensitivity, and changes spectral sensitivity to the dim, longer wavelengths of light existing at the bottom of the ocean. As hydrothermal vents produce light, vision may supplement thermal and chemical senses to orient post-larval settlement at vent sites.
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美国科学家声称，人生来有两个脑，即颅脑与肠脑。 肠脑位于食管、胃脏、小肠与结肠内层组织的鞘中，含有神经细胞、神经递质、蛋白质和复杂的环形线路。结肠炎、过敏性肠综合症等都与肠脑内产生的问题有关。肠脑中几乎能找到颅脑赖以运转和控制的所有物质，如血清素、多巴胺、谷氨酸、去甲肾上腺素、一氧化氮等。此外，肠脑中还存在多种被称为神经肽的脑蛋白、脑啡肽以及对神经起显著作用的化学物质。 颅脑面临惊恐时释出的应激激素套种击胃脏发生痉挛；惊恐又引起交感神经影响肠脑的血清素分泌量。应激激素过分刺激还会导致腹泻。当情绪压抑时，食管神经受到高度刺激会感到吞咽困难；颅脑释出的应激激素还会改变胃脏与食管间的神经功能，导致胃灼热。最初的脑神经系统起始于管形动物，生存竞争需要更复杂的颅脑，从而发展了中枢神经系统。重要的肠神经系统不能进入头颅与胃肠相联，而为了适应高级动物进食和消化的需要，自然法则就保存了有独立功能的肠神经系统。就人而言，早期胚胎发育中产生的神经，一部分进入了中枢神经系统，另一部分变成肠神经系统，通过迷走神经连接两者――颅脑和肠脑。
A．它是不依赖中枢神经系统而独立活动的神经系统B．它的物质构成中含有神经细胞及对其起显著作用的物质C．它具有同颅脑一样的能够控制肠胃运转的独立功能D．它起源于管形动物的脑神经系统并从中分化出来
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The hard, out surface of the tooth is called enamel.
A．outside
B．appearance
C．outer
D．hiding
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使用OTDR进行测试时，接地线和不接地线都可以。
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治疗大出血时加用补气药的机制是
A．气能生血
B．气能行血
C．气能摄血
D．血能生气
E．血能载气
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挑选粉底色号一般在面部哪块区域试色（）
A.脸颊B.额头C.下巴D.下颌
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九气拈痛丸的功能是（ ）
A.活血化瘀，行气止痛 B.行气活血，祛瘀止痛 C.理气，宽胸，止痛 D.理气，活血，止痛 E.活血祛瘀，通脉活络
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机床类别代号“Y”表示该设备为( )。
A．仪表机床
B．齿轮加工机床
C．压力机
D．研磨机
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