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John had his leg broken the other day, which______his absence from class for the last week..
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经食管超声的适应证包括A、TTE难以确诊的先天性心脏病,如复.....
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关于航空活塞发动机起动时注油的说法,正确的是:A.夏天注油.....
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You re the person you are, so it makes sense to be that person rather than someone______.A..
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左心室收缩功能常用评价指标不包括A、左心室容量B、每搏量C、.....
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据2000年统计,吉林省蒙古族人口有()人。..
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