晶核生长必须有以下哪些步骤?
A: recovery
B: recrystallization
C: both are not need
D: both are needed
A: recovery
B: recrystallization
C: both are not need
D: both are needed
举一反三
- Heating the cold-worked metal progresses in three stages: A: recrystallization, recovery, grain growth B: recovery, recrystallization, grain growth C: recovery, crystallization, recrystallization D: recovery, crystallization, grain growth
- ______knowledge and experience are needed to finish that task. A: Either B: Neither C: None D: Both
- Both covalent bonds and noncovalent bonds are needed to form a macromolecular assembly
- Both DNA polymerase and RNA polymerase are needed in DNA replication process.()
- Both the North and South needed a powerful central government before the Civil War.