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【多选题】
Based on the nature and purpose of the study, clinical research includes the following types:A.
Prevention trials look for better ways to prevent a disease in people who have never had the disease or to prevent the disease from returning. Approaches may include medicines, vaccines, or lifestyle changes.
B.
Screening trials test new ways for detecting diseases or health conditions. Diagnostic trials study or compare tests or procedures for diagnosing a particular disease or condition.
C.
Treatment trials test new treatments, new combinations of drugs, or new approaches to surgery or radiation therapy. Behavioral trials evaluate or compare ways to promote behavioral changes designed to improve health.
D.
Quality of life trials (or supportive care trials) explore and measure ways to improve the comfort and quality of life of people with conditions or illnesses.
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【判断题】食物特殊动力作用,也称为食物的代谢反应, 即是 由于人体摄入食物而引起机体内能量消耗额外增高的现象称为食物特殊动力作用。 它在人体能量消耗中占最大部分。
A.
正确
B.
错误
【单选题】You can see a man in the photo. [ ]
A.
21 years old
B.
21-years-old
C.
21 year old
D.
21-year-old
【单选题】Su Lijie, 39-year-old female graduate of Peking University’s graduate school ended up ____as a house painter back in her hometown.
A.
to work
B.
worked
C.
being worked
D.
working
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