• A. a longer life expectancy for most people
• B. artists are adroit in dealing with their painting subject
• C. engage in the medical profession
• D. careful study and experimentation
• E. the chief centers for medical care in most countries
• F. science and technology

Doctors apply the knowledge gained through______.

A．strong measures have been taken by the government to prevent global warming.
B．to reduce carbon emissions is all impossible mission.
C．despite the difficulty, scientists have some options to prevent global warming.
D．actions suggested by scientists will never be realize