Topic content:
The correct way to do the following in life is
A. Frequent driving to work conforms to the concept of "low-carbon life"
B. Using "leather milk" to produce dairy products can increase the protein content of products
C. Adding "clenbuterol" into the feed can increase the lean meat rate of pork
D. In order to alleviate the shortage of fossil energy and protect the environment, people can develop and utilize renewable clean energy such as hydrogen energy and solar energy
Best answer:
D
Answer analysis:
Hydrogen and solar energy are new energy sources
Test core:
The existence form of elements in human body:
① Carbon, hydrogen, oxygen and nitrogen mainly exist in the form of water, sugar, protein, vitamins and fat.
② Other elements mainly exist in aqueous solution in the form of inorganic salts.
③ Calcium element mainly exists in the form of hydroxycalcium phosphate [Ca10 (PO4) 6 (OH) 2] crystal.