题目内容
（请给出正确答案）
What is the underlying significance of the invention of the Kodak？
A．It marked the beginning of manufacturing small cameras.
B．It met the need of photographers in America and Europe.
C．It made picture-taking suddenly popular among ordinary people.
D．It made the work of professionals more enjoyable.
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A、issuing bank
B、negotiatiing bank
C、beneficiary
D、applicant
"Credit" means an arrangement that is ______ and constitutes a definite ______ of the issuing bank to honour a complying ______.
A credit is ______ even if there is no indication to that effect.
A、Studying relevant factors of disease and health status at an indivivual level.
B、Only studying the prevalence of communicable disease and prevention measures.
C、Only studying risk factors of non-communicable disease.
D、Studying the distribution of disease and health status in population and relevant factors.
E、Only studying treatment measures
A、Population level
B、Start from the distribution
C、Treatment only
D、Comparision
E、Prevention
A、There is a contorl group.
B、There is no contorl group.
C、There is an intervention or not.
D、Using blind method or not.
E、Statistical methods.
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