Either force may be considered the “action(作用力),” and the other the “reaction(反作用力)” to it.

A common ______ to jokes is to laugh. A: response B: reaction C: action D: respond

中国大学MOOC: The two forces in action-reaction pair act on different objects.

The two forces in action-reaction pair act on different objects. A: 正确 B: 错误

If the reaction of 2A+B → C is a elementary reaction, which choice listed below is true? A: it is a second order reaction B: it is a slow reaction C: it is a second order reaction to B D: it is a second order reaction to A

The rate constant of the reaction changes as the reaction proceeds.

For an elementary reaction, the reaction order is same to the molecularity.

Which<br/>of the following reactions can occur in tropane alkaloids?() A: vitali<br/>reaction B: complexation<br/>reaction C: coordination<br/>reaction D: precipitation<br/>reaction E: condensation<br/>reaction

It is known that the chemical reaction A + B → C + D is a elementary reaction, then it can be inferred that the total order of this reaction is 2.

Which one of the following enzymatic reactions is reversible? ( ) A: The reaction catalyzed by glycogen phosphorylase B: The reaction catalyzed by phosphoglycerate kinase C: The reaction catalyzed by pyruvate kinase D: The reaction catalyzed by fructose bisphosphatase-1 E: The reaction catalyzed by hexokinase