Most solid materials are ( )
A: Crystal
B: Enzyme
C: Protein
D: Quasicrystal
A: Crystal
B: Enzyme
C: Protein
D: Quasicrystal
A
举一反三
- Solid<br/>materials can be classified into the following types ( ) A: Amorphous B: Polycrystalline C: Single<br/>crystal D: Mixed<br/>crystal
- The following belong to the protein classification is ( ). A: toxin B: enzyme C: antibiotic D: structural protein
- The enzyme neuraminidase consists of a ring of __ identical protein subunits.
- When an enzyme protein is purified and assayed step by step, _____________________________________ with each step. A: oth activity and total protein generally increase B: activity increases but total protein generally decreases C: oth activity and total protein generally decrease D: activity decreases but total protein generally increases
- Which of the following expressions is correct? A: Carbonaceous materials are the most widely used cathodes because they are non-toxic and provide good stability. B: Carbonaceous materials are the most widely used cathodes because they are non-toxicity and good stability. C: Carbonaceous materials are the most widely used cathodes due to their non-toxicity and high stability. D: Carbonaceous materials are the most widely used cathodes due to non-toxic and highly stable.
内容
- 0
What’re the most industrially important polymeric materials?
- 1
Cast iron is the most widely used engineering material, and also the most recycled of all materials
- 2
Cast iron is the most widely used engineering material, and also the most recycled of all materials A: 正确 B: 错误
- 3
According to the author, in college the materials taught are the most important things.
- 4
O·Henry got most materials for his stories from ________.