题干

研究表明:一氧化氮吸入治疗法可快速改善SARS重症患者的缺氧状况,缓解病情。病毒学研究证实,一氧化氮对SARS病毒有直接抑制作用。下列对一氧化氮的叙述正确的是

A:一氧化氮是一种红棕色的气体

B:一氧化氮的摩尔质量为30

C:常温常压下,一氧化氮能与空气中的氧气直接化合

D:一氧化氮易溶于水,不能用排水法收集

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答案(点此获取答案解析)

C

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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