The energy gained from the sun can then be used during the night to enable the necessary, chemical reactions to ___________ in his body.
A: precede
B: proceed
C: progress
D: practise
A: precede
B: proceed
C: progress
D: practise
举一反三
- The energy gained-from the sun can then be used during the night to enable the necessary chemical reactions to ______ in his body. A: precede B: proceed C: progress D: practice
- All chemical reactions in the body are catalyzed by enzymes. A: 正确 B: 错误
- Heat energy（）from the sun in a direct way is the most widely used energy today. A: come B: to come C: coming D: having come
- Enzymes speed up chemcial reactions by... A: lowering activation energy. B: increasing the activation energy needed. C: breaking the chemical energy needed. D: stopping the chemical reaction.
- Which equipment is used to convert chemical energy into electrical energy?