HCBBS Forum (English)
HomeForumView Original
Submit Chemical Projects / Find Solutions
Amplify Your Requirements on a Broader Chemical Platform *Engineering · Technology · Equipment · Solutions*
Submit Request
English Translations » 炼制(催化焦化深加工) » Practice questions on March 3, 2017; replies will earn 2–6 p

Practice questions on March 3, 2017; replies will earn 2–6 points (no scoring after the answers are shown, thank you for your replies)

2017-03-03View Original

Thread Content

Multiple-choice question: The phenomena that occur when black oil appears at the initial stage are (　AB　). A. The initial top oil turns black B. The initial side oil turns black C. The initial bottom oil turns black D. The regular top oil turns black
Reply #22017-03-03
A. The initial top oil turns black B. The initial side oil turns black

Related Threads in This Forum

← Previous

Next →

Translated at 2026-07-21 05:08:45

Original: https://bbs.hcbbs.com/thread-1752661-1-1.html

© 2026 HCBBS Forum. Content translated for international readers.

Submit a Project

**Looking for Chemical Technology, Equipment & Solutions?** No Registration Required Broader Platform Exposure | Global Chemical Service Provider Connections

Submit Request — Free Consultation

Disclaimer

This is an automated machine translation of the original thread. Some technical terms may have inaccuracies; the original text shall prevail. Click "View Original" at the top right to access the source page, which supports IP-based automatic real-time language translation. Please watch out for contact details and sales inducements to prevent fraud. All content and translations are for reference only, representing solely the poster's personal views. For enquiries, email service@hcbbs.com.

Quick Links