The change in which a new substance is formed calls a chemical change（）.
calls→is called
举一反三
- With a chemical r______, a new substance can form.
- A chemical is any aspect of a substance which is only seen by means of a chemical reaction (反应).
- A chemical __________ is any aspect of a substance which is only seen by means of a chemical reaction. (property)
- Derivatives are formed by using prefixes and suffixes. Prefixes usually change the class but suffixes usually change the meaning.
- ______(heat) water does not change its chemical composition.
内容
- 0
We<br/>can get a new substance if we _____ a chemical substance with others. A: incorporate B: insert C: obtain D: deprive
- 1
To identify a substance, chemists observe two distinct types of , physical and chemical, which are related to physical and chemical that matters undergoes.
- 2
Atoms can be neither created nor destroyed during a chemical change
- 3
Which of the following is not part of the change-management process of IT supervisor（） A: change analyses B: change evaluation C: change acquisition D: change executing
- 4
Semantic change means an old form which takes on a new ( ) to meet the new need. A: form B: meaning C: look D: pronunciation