B) The bodys major hormones.
C) Expectations about health or disease.
D) Many subconscious ways.
4. Why did the patients whose dentists thought they had at least a 50-50 chance of being given a painkiller suffer significantly less pain?
A) Because of doctors expectations.
B) Because of the placebo effect.
C) Because of the healing power of the medicine taken.
D) Because of the excellent medical skills of the doctors.
5. What does the author mean by saying that for this reason, all properly designed drug trials are double blind ?
A) The physician and the patient are both ignorant of the healing power of the medicine.
B) The physician doesnt know whether the given pill is real or fake.
C) The patient doesnt know whether the given pill is real or fake.
D) Neither the physician nor the patient knows whether the given pill is real or fake.
答案: ABCAD
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