Inconsistent topics: pay attention to whether the conclusion of the topic is related to the topic of the option.
Example enzyme is a kind of small molecular nutrient that can be absorbed by human body without digestion, and its nutritional components are produced by the transformation and proliferation of microorganisms in raw materials. In addition, these microorganisms can also use vitamins, amino acids and other substances in fruits and vegetables for metabolic transformation to produce nutrients. Enzymes also contain trace amounts of enzymes, mainly glucoamylase and protease, which can convert sugar into substances that cells can use. In recent years, enzyme products have been widely publicized by merchants, claiming that enzymes have the effect of losing weight, which makes some consumers who love beauty flock to them.
If true, which of the following can best refute the views of the above-mentioned enterprises:
A. After the enzyme enters the human body, the enzyme in it will be degraded by the digestive system and cannot play a biocatalysis role.
B unqualified enzyme products in the market may cause great harm to the health of users.
C taking some enzyme products containing probiotics and various microorganisms has a certain slimming effect.
D. Under certain conditions, probiotics and microorganisms in enzyme products can promote intestinal peristalsis.
Analysis A. The problem is to tell us that enzymes contain trace amounts of enzymes, which can convert sugar into substances that can be used by cells, so the merchants come to the conclusion that enzymes have the function of losing weight.
A pointed out that the enzyme in the enzyme can't play a role after it enters the human body, indicating that although there are enzymes that can convert sugar in the enzyme, eating it in the stomach will explain that it can't achieve the effect of losing weight, refuting the merchant's point of view and retaining it.
Option b points out that unqualified enzyme products will harm people's health, but the question is whether the enzyme can lose weight, and there is no discussion about unqualified enzyme products. The discussion subjects are inconsistent, irrelevant and excluded.
Option C gives some examples of enzyme products, pointing out that enzyme products can lose weight, and enzymes may really lose weight, supporting the views of merchants and excluding the views of merchants.
Option d points out that enzymes can promote intestinal peristalsis, but whether they can lose weight is not said, so they cannot be refuted and ruled out.
So, the answer to this question is a.
Item b of this question discusses the harm of unqualified enzymes, but the main question is whether enzymes can lose weight. Obviously, is unqualified enzyme harmful? With what? The role of enzymes? The topics discussed are inconsistent, so they are irrelevant.
I hope that through a lot of practice, we can improve our sensitivity to irrelevant items, and finally we can know the pearl with our eyes and avoid such confusing items.
?