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【单选题】
下面不合法的转义字符是 ( )A.
’\018’
B.
’\\’
C.
’\ ’ ’
D.
’\xcc’
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举一反三
【多选题】Types of clinical research include:
A.
Epidemiology, which improves the understanding of a disease by studying patterns, causes, and effects of health and disease in specific groups.
B.
Behavioral, which improves the understanding of human behavior and how it relates to health and disease.
C.
Health services, which looks at how people access health care providers and health care services, how much care costs, and what happens to patients as a result of this care.
D.
Clinical trials, which evaluate the effects of an intervention on health outcomes.
【简答题】The four common types of clinical research include epidemiology, behavioral study, _________________, and _____________.
【简答题】简述美国的电子商务立法的情况
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