Wisdom Tree knows the answers to the face-to-face class "Food Safety (Zhejiang University, Peking University, China Agricultural University and other 13 universities - cross-school joint construction)"

1. Microorganisms ( microorganism) has a small shape, simple structure, and is invisible to the naked eye. It must be seen clearly with the help of an optical microscope or an electron microscope. The size of microorganisms is generally about ().

A. Less than 1mm

B. Less than 0.1mm

C. Less than 0.8mm

D. Less than 0.01mm

Correct answer: less than 0.1mm

2. Ingestion of pathogenic E. coli into the human body can cause food poisoning. What symptoms may result?

A. Diarrhea

B. Gastroenteritis

C. Dizziness

D. Intestinal bleeding

Correct answer: Diarrhea#Gastroenteritis#Intestinal bleeding

3. The half-lethal dose of nitrite is 22mg/kg. If a person weighs 60kg, then if a person consumes more than () grams of nitrite It will cause acute poisoning.

A.2 grams

B.1 grams

C.0.5 grams

D.0.1 grams

Correct answer: 1 gram

4. What are the main potential hazards of leftovers?

A. Breeding of harmful microorganisms

B. Increase in food aroma

C. Food spoilage

D. Nitrite content Elevated

Correct answer: Reproduction of harmful microorganisms#Food spoilage#Elevated nitrite content

5. Yeast is the type of yeast that has the most extensive relationship with human life. Which of the following foods can it be used to make?

A. Bread

B. Steamed buns

C. Brewing

D. Rice

Correct answer: Bread#Steamed Bun#Winemaking

6. During the fermentation process of Pu'er tea, which of the following microorganisms will be involved?

A. Aspergillus niger

B. Penicillium chrysogenum

C. Escherichia coli

D. Rhizopus

Correct answer: Aspergillus niger#Penicillium chrysogenum#Rhizopus

7. Approximately how many microorganisms are there on an old banknote?

A. 30 million

B. 25 million

C. 21 million

D. 18 million

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Correct answer: 21 million

8. What is the approximate proportion of beneficial bacteria in a healthy person?

A.80%

B.70%

C.60%

D.50%

Correct answer: 70%

9. Which of the following statements about food safety is correct?

A. Excessive additives in biscuits are within the scope of Food Safety

B. Adding melamine to milk is a Food Security problem

C. Food damage caused by long-term drought Lack of it is a Food Safety problem

D. The presence of dead flies in the dishes provided by the restaurant is a Food Security problem

Correct answer: Excessive additives in biscuits are a Food Safety problem

10. The microorganisms in the intestines are closely related to our health. How many microorganisms are there in the intestines in general? How many species can be cultured?

A.

B.

C.

D.

Correct answer:

1. Among the following foods that are approaching their shelf life, which one has a relatively greater food safety risk?

A. Beef jerky

B. Biscuits

C. Edible oil

D. Pasteurized milk

2. Which of the following food container materials is relatively safer?

A. Tinplate

B. Plastic

C. Glass

D. Cardboard

Correct answer: Glass

3. Which of the following statements about food safety are correct?

A. Food science and technology originated from the basic need for safe food preservation

B. New technologies, such as biotechnology, also bring certain food safety risks

C. Modern people feel that food safety issues have become more prominent, partly because technological advancement has allowed more risk factors to be identified

D. The concept of "returning to nature" helps improve food safety

Correct answer: Food science and technology originated from the basic need for safe food preservation #New technologies, such as biotechnology, also bring certain food safety risks #Modern people feel that food safety issues are more prominent, partly because of technology Advances allow more risk factors to be identified