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问题
判断题
卫生检疫机关对油轮在实舱时进行检查，确认船舶无鼠害的，可以签发免予除鼠证书。 ( )
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参考答案：
对
名词解释
结构主义——符号学电影理论
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选择题
Over the past decades
, sea ice _____ in the Arctic as a result of global warming.
A. had decreased
B. decreased
C. has been decreasing
D. is decreasing
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