问答题

Which are NOT free in medical system in western countries? ()

A. medication
B. dentist
C. to give birth
D. Ophthalmologist
此题为多项选择题。

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The outside resources of contamination in SSIS (Surgical Site Infections) include ( ) .

A、Patients’ own normal flora
B、surgical personnel
C、surgical instruments
D、air
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When you cancel your appointment, remember . ()

A. to talk politely
B. to be sincerely
C. to give a good reason
D. to feel sorry
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