Topic content:
On April 14, 2010, a major earthquake occurred in Yushu, Qinghai
(1) "Saving life is the first". In order to search and rescue the survivors buried under the ruins, many search and rescue dogs have been called. The search and rescue dogs can find survivors according to the smell of human body. From a microscopic perspective, the reason why the search and rescue dogs can find survivors is
______.
A. The molecular mass is very small
B. Different molecules have different properties
C. Molecules keep moving
D. Intermolecular spacing
(2) Peracetic acid (C2H4O3) disinfectant is commonly used to disinfect the living environment of earthquake victims. The mass ratio of carbon, oxygen and hydrogen in peracetic acid is
______.
(3) During the earthquake relief, rice, vegetable oil, vegetables, eggs and other necessities of life were continuously transported from all parts of the country to the disaster areas. Vegetables are rich in
______(filled with nutrients), main poultry eggs mainly contain
______(Fill in nutrients)
(4) Use
______To identify whether a garment fabric is made of synthetic fiber or pure wool
Best answer:
(1) According to the meaning of the question, the reason why search dogs can find survivors from a microscopic perspective is that: the molecules in the smell of human body are constantly moving;
(2) According to peracetic acid (C2H4O3), the mass ratio of carbon, oxygen and hydrogen in peracetic acid is
(12×2):(16×3):(1×4)=6:
12:
1、;
(3) Knowing the six nutrients, we can know that vegetables are rich in vitamins; Main poultry eggs mainly contain protein;
(4) The way to identify synthetic fibers and pure wool: burn or burn, because they have different burning smells
Therefore, the answer is:
(1)C;
(2)6:
12:
1、;
(3) Vitamins; protein;
(4) Burning or burning
Answer analysis:
There is no explanation for this question
Test core:
Nutrients needed by human beings: In order to maintain life and health, human beings must take food. The ingredients of food mainly include protein, sugar, oil, vitamin, inorganic salt and water, which are generally called the six basic nutrients.