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COMMERCIAL INVOICE(发货单)

Date: December 10, 2016                  Invoice No: D15454978E

Purchase Order No:8928                   Bill of loading/ Air Waybill No:2309456703W

Contact name: Dan Richman

Company name: Scan Technology, Ltd.

Company address: 2, South Wabash

Chicago, IL60637

Telephone number: (1) 319 554 811

E-mail: danrichman@scantech.com

CONSIGN EE(收件人)

Contact name: Lee Haojie

Company name: First Computers Co.

Company address: 35 HeDong Road Beijing, China

Telephone number: (86) 134591102

E-mail: haojie@first.com.cn

Goods Description

Model number

Quantity

Country of Origin

Unit Value

Total Value

80211 Handheld

Scanner

8021101

3

USA

$120.00

$360.00

80211Base Communicator

8021183

1

USA

$200.00

$200.00

80211 Cables and

Connectors

8021111

3

USA

$30.50

$91.50

Comments: Mr. Lee, I am able to offer a 8% discount since your total purchase is above $500. We value your business and are looking forward to more opportunities with you.

Invoice Sub Total

$651.50

Discount

$52.12

Insurance

$0.00

Invoice Total

$599.38

Shipper's signature

:Dan Richman

Number of Package

1

Total Weight

5.15kg

From: Lee Haojie

Subject: Handheld Scanners

    Ms. Hu, I received the parcel from Scan Technology 1 piece. The scanner model they sent is correct, and the quantity is right. However, I've discovered the cables and connectors are all wrong. They are not suitable for the model 8021101.

    Can you do me a small favor and go through the product information website and see if the cables and connectors are still compatible (兼容的)with the 8021101 scanners? I have no wish to unpack the cables and connectors and try connecting them to the scanners. I believe we will have problem asking for an exchange if the cables and connectors are not compatible. If the website suggests an incompatibility, please contact Dan Richman and request an exchange for the collect model. (Refer to the invoice for his e-mail address.)

    I will only use the scanners for our project once we have resolved the exchange issue. We should not proceed unless we get confirmation (证实)on their compatibility. I am looking to resolve this in the shortest possible time as it would be disastrous to wait for this exchange without making progress on the project.

Haojie

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同类题4

以黄铁矿为原料生产硫酸的工艺流程图如下:

(1)将燃烧黄铁矿的化学方程式补充完整:4____  +11O22Fe2O3+8SO2

(2)接触室中发生反应的化学方程式是____  .

(3)依据工艺流程图判断下列说法正确的是(选填序号字母)____ .

a.为使黄铁矿充分燃烧,需将其粉碎

b.过量空气能提高SO2的转化率

c.使用催化剂能提高SO2的反应速率和转化率

d.沸腾炉排出的矿渣可制造水泥或制砖,含铁品位高的矿渣可炼铁

(4)每160g SO3气体与液态H2O化合放出260.6kJ的热量,该反应的热化学方程式是 ____ .

(5)吸收塔排出的尾气先用氨水吸收,再用浓硫酸处理,得到较高浓度的SO2和铵盐.

①SO2既可作为生产硫酸的原料循环再利用,也可用于工业制溴过程中吸收潮湿空气中的Br2.SO2吸收Br2的离子方程式是 ____ .

②为测定该铵盐中氮元素的质量分数,将不同质量的铵盐分别加入到50.00mL相同浓度的NaOH溶液中,沸水浴加热至气体全部逸出(此温度下铵盐不分解).该气体经干燥后用浓硫酸吸收完全,测定浓硫酸增加的质量.铵盐质量为10.00g和20.00g 时,浓硫酸增加的质量相同;铵盐质量为30.00g时,浓硫酸增加的质量为0.68g;铵盐质量为40.00g时,浓硫酸的质量不变.计算:该铵盐中氮元素的质量分数是____ %;若铵盐质量为15.00g,浓硫酸增加的质量为 ____ .(计算结果保留两位小数)