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【单选题】
患者，已婚妇女，25岁，停经45天，恶心、呕吐1就诊。妇科检查示子宫较正常稍大、软，着色。最有价值的辅助检查是A.
黄体酮试验
B.
尿妊娠试验
C.
基础体温测定
D.
黏液检查
E.
阴道脱落细胞学检查
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皮皮学刷刷变学霸
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【单选题】A century ago in the United States, when an individual brought suit against a company, public opinion tended to protect that company. But perhaps this phenomenon was most striking in the case of the r...
A.
Farwell was injured because he negtly ran his engine off the track.
B.
Farwell would not have been injured if the switchman had been more careful.
C.
The court argued that the victim had accepted the risk since he had willingly taken his job.
D.
The court decided that the railroad should not be held responsible.
【单选题】A century ago in the United States, when an individual brought suit against a company, public opinion tended to protect that company. But perhaps this phenomenon was most striking in the case of the r...
A.
Farrell was injured because he negtly ran his engine off the track.
B.
Farrell would not have been injured if the switchman had been more careful.
C.
The court argued that the victim had accepted the risk since he had willingly taken his job.
D.
The court decided that the railroad should not be held responsible.
【单选题】When an individual buys a car in a congested area, it generates
A.
a positive externality.
B.
a technology spillover.
C.
an efficient market outcome.
D.
a negative externality.
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