全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青岛新华书店旗舰店

Brand: 企业管理出版社    Sold By: EM China
全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青岛新华书店旗舰店
全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青岛新华书店旗舰店
全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青岛新华书店旗舰店
全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青岛新华书店旗舰店

全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青岛新华书店旗舰店

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全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青岛新华书店旗舰店

全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青...

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编辑推荐  王春洪编著的这本《自然密码(科学探索与发现)》用深入浅出的语言,向青少年读者介绍了宇宙地球知识、地理知识、动植物知识、微生物知识、气象知识等,使读者在轻松阅读的同时,能够在宏观上对自然知识有一定的了解。本书适合中学生和小学的学生阅读,是一本很好的百科知识课外读物。  目  录宇宙地球篇
Product Details
编辑推荐
  王春洪编著的这本《自然密码(科学探索与发现)》用深入浅出的语言,向青少年读者介绍了宇宙地球知识、地理知识、动植物知识、微生物知识、气象知识等,使读者在轻松阅读的同时,能够在宏观上对自然知识有一定的了解。本书适合中学生和小学的学生阅读,是一本很好的百科知识课外读物。  
目  录
宇宙地球篇












在线试读
洋流洋流又称海流,海洋中除了由引潮力引起的潮汐运动外,海水还会沿一定途径行大规模流动。引起海流运动的因素可以是风,也可以是热盐效应造成的海水密度分布的不均匀性。前者表现为作用于海面的风应力,后者表现为海水中压。加上地转偏向力的作用,便造成海水既流动,又有垂直流动。由于海岸和海底的阻挡和摩擦作用,海流海岸和海底处的表现,与在开阔海洋上有很大的差别。
  大洋中深度小于二三百米的表层为风漂流层,行星风系作用在海面的风应力湍流应力的合力,与地转偏衡后,便生成风漂流。行星风系风力的大小和方向,都随纬度变化,导致海面海水的辐合和辐散。一方面,它使海水密度重新分布而出压,当它和地转偏衡时,在相当厚层中形方向的地转流;另一方面,在赤道地区的风漂流层底部,海水从次表层水中向上流动,或下降而流人次表层水中,形成了赤道地区的升降流。
  大洋上的结冰、融冰、降水和蒸发等热盐效应,造成海水密度在大范围海面分布不均匀,可使极地和高纬度某些海域表层生成高密度的海水,而下沉到深层和底层。压的作用下,方向的流动,并可通过中层水底部向上再流到表层,这就是大洋的热盐环流。
  大洋表层生成的风漂流,构成大洋表层的风生环流。其中,位于低纬度和中纬度处的北赤道流和南赤道流,在大洋的西边界处受海岸的阻挡,其主流便分别转而向北和向南流动,由于科里奥利参量随纬度的变化(β-效应)湍流摩擦力的作用,形成流辐变窄、流速加大的大洋西向强化流。每年由赤道地区传输到地球的高纬地带的热量中,有一半是大洋西边界西向强化流传输的人大洋上层的热盐环流,在北半球由于和大洋西向强化流的方向相同,使流速增大;但在南半球则因方向相反,流速减缓,故大洋环流西向强化现象不太显著。
  大洋表层风生环流在南半球的中纬度和高纬度地带,由于没有大陆海岸阻挡,形成了一支环绕南极大陆连续流动的南极绕极流。
  在大洋的东部岸海域,当风力长期地、几乎沿行地均匀吹刮时,一方面生成风漂流,发生海水辐合和辐散,而出现上升流和下降流;另一方面因海水岸处积聚和流失而造成海面倾斜,发压而产生沿岸流,就形成沿岸的升降流。
  大洋西向强化流在北半球向北(南半球向南)流动,而后折向东流,至某特定地区时,流动开始不稳定,流轴均位置便发生波状的弯曲,出现海流弯曲(或蛇行)现象,最后形成环状流而脱离母体,生成了中央分别为来自大陆架的冷水的冷流环和来自海洋内部的暖水的暖流环。这是一类具有中等尺度的中尺度涡。此外,在大洋的其他部分,由于海流的不稳定,也能形成其他种类的中尺度涡。这些中尺度涡集中了海洋中很大一部分能量,形成了叠加在大洋气均环流场之上的各种天气式涡旋,使大洋环流更加复杂。
  在海洋的大陆架范围或浅海处,由于海岸和海底摩擦显著,加上潮流强等因素,便形成颇为复杂的大陆架环流、浅内海环流、海峡海流等浅海海流。
商品详情
  图书基本信息
图书名称全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青岛新华书店旗舰店作者王春洪
定价30.0出版社企业管理出版社
ISBN9787516406984出版日期2014-04-01
版次1开本

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编辑推荐
  王春洪编著的这本《自然密码(科学探索与发现)》用深入浅出的语言,向青少年读者介绍了宇宙地球知识、地理知识、动植物知识、微生物知识、气象知识等,使读者在轻松阅读的同时,能够在宏观上对自然知识有一定的了解。本书适合中学生和小学的学生阅读,是一本很好的百科知识课外读物。  
目  录
宇宙地球篇












在线试读
洋流洋流又称海流,海洋中除了由引潮力引起的潮汐运动外,海水还会沿一定途径行大规模流动。引起海流运动的因素可以是风,也可以是热盐效应造成的海水密度分布的不均匀性。前者表现为作用于海面的风应力,后者表现为海水中压。加上地转偏向力的作用,便造成海水既流动,又有垂直流动。由于海岸和海底的阻挡和摩擦作用,海流海岸和海底处的表现,与在开阔海洋上有很大的差别。
  大洋中深度小于二三百米的表层为风漂流层,行星风系作用在海面的风应力湍流应力的合力,与地转偏衡后,便生成风漂流。行星风系风力的大小和方向,都随纬度变化,导致海面海水的辐合和辐散。一方面,它使海水密度重新分布而出压,当它和地转偏衡时,在相当厚层中形方向的地转流;另一方面,在赤道地区的风漂流层底部,海水从次表层水中向上流动,或下降而流人次表层水中,形成了赤道地区的升降流。
  大洋上的结冰、融冰、降水和蒸发等热盐效应,造成海水密度在大范围海面分布不均匀,可使极地和高纬度某些海域表层生成高密度的海水,而下沉到深层和底层。压的作用下,方向的流动,并可通过中层水底部向上再流到表层,这就是大洋的热盐环流。
  大洋表层生成的风漂流,构成大洋表层的风生环流。其中,位于低纬度和中纬度处的北赤道流和南赤道流,在大洋的西边界处受海岸的阻挡,其主流便分别转而向北和向南流动,由于科里奥利参量随纬度的变化(β-效应)湍流摩擦力的作用,形成流辐变窄、流速加大的大洋西向强化流。每年由赤道地区传输到地球的高纬地带的热量中,有一半是大洋西边界西向强化流传输的人大洋上层的热盐环流,在北半球由于和大洋西向强化流的方向相同,使流速增大;但在南半球则因方向相反,流速减缓,故大洋环流西向强化现象不太显著。
  大洋表层风生环流在南半球的中纬度和高纬度地带,由于没有大陆海岸阻挡,形成了一支环绕南极大陆连续流动的南极绕极流。
  在大洋的东部岸海域,当风力长期地、几乎沿行地均匀吹刮时,一方面生成风漂流,发生海水辐合和辐散,而出现上升流和下降流;另一方面因海水岸处积聚和流失而造成海面倾斜,发压而产生沿岸流,就形成沿岸的升降流。
  大洋西向强化流在北半球向北(南半球向南)流动,而后折向东流,至某特定地区时,流动开始不稳定,流轴均位置便发生波状的弯曲,出现海流弯曲(或蛇行)现象,最后形成环状流而脱离母体,生成了中央分别为来自大陆架的冷水的冷流环和来自海洋内部的暖水的暖流环。这是一类具有中等尺度的中尺度涡。此外,在大洋的其他部分,由于海流的不稳定,也能形成其他种类的中尺度涡。这些中尺度涡集中了海洋中很大一部分能量,形成了叠加在大洋气均环流场之上的各种天气式涡旋,使大洋环流更加复杂。
  在海洋的大陆架范围或浅海处,由于海岸和海底摩擦显著,加上潮流强等因素,便形成颇为复杂的大陆架环流、浅内海环流、海峡海流等浅海海流。
商品详情
  图书基本信息
图书名称全新正版图书 自然密码-科学探索与发现 王春洪 企业管理出版社 9787516406984 青岛新华书店旗舰店作者王春洪
定价30.0出版社企业管理出版社
ISBN9787516406984出版日期2014-04-01
版次1开本

Shipping Overview: 

Shipping: Standard Domestic Shipping within the United States charges USD 4.99. Standard International Shipping from United Kingdom, Germany and Japan to the United States charges 14.99. 

Order Processing: Please allow 1-2 business days for order processing and preparation before shipment. 

Domestic Shipping: Orders within the U.S. are shipped via USPS or FedEx, depending on the origin of the product. The average transit time is 3-7 business days. 

International Shipping: Currently, we only ship within the USA. 

Tracking Information: Every order is trackable. You will receive a tracking number once your order has been shipped. Products may be shipped from various global fulfillment centers.

Shipping Delays: 

Please note that shipping times may vary due to factors beyond our control, such as weather conditions, natural disasters, or peak holiday periods. While we strive to ensure timely delivery, the exact arrival time cannot be guaranteed and is managed by the shipping carrier.

Shipping Options:

  • Standard Delivery: Most orders are shipped within 3-7 business days. Larger items may utilize LTL shipping for safe handling.

  • Handling Time: We handle shipments on business days (Monday - Friday), with a preparation time of 1-2 days.

  • Additional Charges: Some items require additional shipping charges due to their size, weight, or special handling. These charges are specified on the product pages and are not eligible for shipping discounts.

  • Exclusions: Gift cards, packaging, taxes, and prior purchases do not count toward the minimum purchase requirement for free shipping. This offer is valid only for shipments to U.S. addresses, including Puerto Rico.

Delivery Details:

  • Estimates: Standard shipping within the US typically takes 3-7 business days. These are estimates and not guarantees.

  • Shipping Restrictions: We ship to all 50 states, Washington, DC, U.S. territories, and APO/FPO/DPO addresses. Shipping options vary based on the delivery address.

  • Remote Areas: Shipments to remote areas may incur additional charges or require pickup from a nearby shipping partner’s location.

Shipping Confirmation:

You will receive a shipping confirmation email with a tracking number as soon as your order is dispatched. If you do not receive this email immediately, please be assured that your items will arrive within the estimated delivery window provided at checkout.

Order Modifications:

If you need to cancel or modify your order, please contact our customer support immediately.

Issues with Delivery:

If your order shows as delivered but you have not received it, please contact the shipping carrier directly to resolve the issue. For persistent problems, contact our customer service at cs@everymarket.com.

Customer Support:

Our team is available 24/7 to assist you with any questions or concerns regarding your order. We are committed to ensuring a smooth shopping experience.

Return & Refund Policy Overview

Please review our return and refund policies below to ensure a smooth transaction process.

Return Policy

  • Duration: You have 30 days from receiving your item to initiate a return.

  • Condition: Items must be unworn, unwashed, with original tags and packaging intact.

  • Shipping Costs: Customers are responsible for return shipping costs.

  • Packaging: Ensure returned items are well-packaged to avoid damage during transit.

  • Tracking: Use a trackable and insured shipping method as we are not liable for items lost or damaged on return.

  • Initiating a Return: Contact us at cs@everymarket.com to start your return. We will provide a return shipping label and instructions upon approval. Returns without prior approval will not be accepted.

How to Return

  • Method: Returns must be sent back by mail to the address provided in the return instructions.

Return Label

  • Defective Products: Return labels are provided for defective items.

  • Non-Defective Returns: Customers are responsible for obtaining their return shipping label.

Product Conditions for Return

  • Eligible Products: Returns are only accepted for items in new condition.

Nonreturnable Items

Certain items are not eligible for return:

  • Electronic devices after 30 days (e.g., computers, laptops, Kindles)

  • Gift cards, prepaid game cards

  • Perishable goods, live insects, some jewelry, some health and personal care items

  • Customized or personalized products

  • Items with special shipping restrictions

Refund Policy

  • Window: Eligible products may be returned within 30 days of delivery for a refund.

  • Refund Method: Refunds are processed to the original payment method or as store credit for items purchased with gift cards.

  • Processing Time: Refunds are processed within 3-5 business days after we receive the return; please allow additional time for shipping and bank processing.

Claims

Inspect your order upon arrival and report any defects, damages, or incorrect items immediately to allow us to address the issue. For claims, contact our support team with details of the issue.

Exchange Policy

For the quickest service, return your original item and place a new order for the desired product once your return is accepted.

Return Address

EveryMarket Customer Service 2101 E Terra Ln, O'Fallon, MO 63366

Customer Support

Available 24/7 for any questions or assistance needed:

  • Phone: +1 636-312-5925

  • Email: cs@everymarket.com

 

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