全新正版图书 化.学.编-身边的科学300问卢宏燕人民出版社9787010084398 自然科学普及读物蔚蓝书店

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全新正版图书 化.学.编-身边的科学300问卢宏燕人民出版社9787010084398 自然科学普及读物蔚蓝书店

Brand: 人民出版社 Sold By: EM China
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全新正版图书 化.学.编-身边的科学300问卢宏燕人民出版社9787010084398 自然科学普及读物蔚蓝书店

全新正版图书 化.学.编-身边的科学300问卢宏燕人民出版社9787010084398 自然科...

$32.71

目  录自然化学篇
1.空气是由什么组成的?
2.海洋中有多少种元素?
3.海水为什么不能饮用?
4.水里有氧气r> 5.为什么物质会燃烧?
6.自燃是如何形成的?
7.什么是爆炸?
8.为什么食物会腐败?
9.溶洞是如何形成的?
10.为什么岩石会被风化?
11.煤是如何产生的?
12.石油是如何产生的?
13.天然气是如何产生的?
14.沼气是如何产生的?
Product Details
目  录
自然化学篇
1.空气是由什么组成的?
2.海洋中有多少种元素?
3.海水为什么不能饮用?
4.水里有氧气r> 5.为什么物质会燃烧?
6.自燃是如何形成的?
7.什么是爆炸?
8.为什么食物会腐败?
9.溶洞是如何形成的?
10.为什么岩石会被风化?
11.煤是如何产生的?
12.石油是如何产生的?
13.天然气是如何产生的?
14.沼气是如何产生的?
在线试读
自然化学篇
  1.空气是由什么组成的?
  空气的成分以氮气、氧气为主,是以来自然界里各种变化所造成的。在原始的绿色植物出现以前,原始大气是以一氧化碳、二氧化碳、甲烷和氨气为主的。在绿色植物出现以后,植物在光合作用中放出的游离氧,使原始大气里的一氧化碳氧化成为二氧化碳,甲烷氧化成为水蒸气和二氧化碳,氨气氧化成为水蒸气和氮气。以后,由于植物的光合作用持续行,空气里的二氧化碳在植物发生光合作用的过程中被吸收了大部分,并使空气里的氧气越来越多,终形成了以氮气和氧气为主的现代空气。
  空气是混合物,它的成分是很复杂的。空气的恒定成分是氮气、氧气以及稀有气体,这些成分之所以几乎不变,主要是自然界各种变化相互补偿的结果。空气的可变成分是二氧化碳和水蒸气。空气的可变成分因地区而异。例如,在工厂区的空气里会因生产项目的不同,而分别含有氨气、酸蒸气等。另外,空气里还含有极微量的氢气、臭氧、氮的氧化物、甲烷等气体。灰尘是空气里或多或少的悬浮杂质地来说,空气的成分一般是比较固定的。
  2.海洋中有多少种元素?
  人类...
商品详情
  图书基本信息
图书名称全新正版图书 化.学.编-身边的科学300问卢宏燕人民出版社9787010084398 自然科学普及读物蔚蓝书店作者卢宏燕
定价24.0出版社人民出版社
ISBN9787010084398出版日期2009-03-01
版次1开本

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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. 

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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.

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Delivery Details:

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  • 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.

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Return Policy

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  • 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

 

目  录
自然化学篇
1.空气是由什么组成的?
2.海洋中有多少种元素?
3.海水为什么不能饮用?
4.水里有氧气r> 5.为什么物质会燃烧?
6.自燃是如何形成的?
7.什么是爆炸?
8.为什么食物会腐败?
9.溶洞是如何形成的?
10.为什么岩石会被风化?
11.煤是如何产生的?
12.石油是如何产生的?
13.天然气是如何产生的?
14.沼气是如何产生的?
在线试读
自然化学篇
  1.空气是由什么组成的?
  空气的成分以氮气、氧气为主,是以来自然界里各种变化所造成的。在原始的绿色植物出现以前,原始大气是以一氧化碳、二氧化碳、甲烷和氨气为主的。在绿色植物出现以后,植物在光合作用中放出的游离氧,使原始大气里的一氧化碳氧化成为二氧化碳,甲烷氧化成为水蒸气和二氧化碳,氨气氧化成为水蒸气和氮气。以后,由于植物的光合作用持续行,空气里的二氧化碳在植物发生光合作用的过程中被吸收了大部分,并使空气里的氧气越来越多,终形成了以氮气和氧气为主的现代空气。
  空气是混合物,它的成分是很复杂的。空气的恒定成分是氮气、氧气以及稀有气体,这些成分之所以几乎不变,主要是自然界各种变化相互补偿的结果。空气的可变成分是二氧化碳和水蒸气。空气的可变成分因地区而异。例如,在工厂区的空气里会因生产项目的不同,而分别含有氨气、酸蒸气等。另外,空气里还含有极微量的氢气、臭氧、氮的氧化物、甲烷等气体。灰尘是空气里或多或少的悬浮杂质地来说,空气的成分一般是比较固定的。
  2.海洋中有多少种元素?
  人类...
商品详情
  图书基本信息
图书名称全新正版图书 化.学.编-身边的科学300问卢宏燕人民出版社9787010084398 自然科学普及读物蔚蓝书店作者卢宏燕
定价24.0出版社人民出版社
ISBN9787010084398出版日期2009-03-01
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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