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【单选题】
下列哪一项最符合心绞痛发作A.
心尖部一过性刺痛
B.
胸骨后压榨性疼痛持续30min
C.
劳力时胸骨后压榨性疼痛,休息3min后缓解
D.
上腹部疼痛，含硝酸甘油1分钟后立即消失
E.
情绪激动后心前区不适，卧床2天后减轻
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反馈参考答案：
举一反三
【单选题】Obviously, the per capita income of a country depends on many things, and any statistical test that does not take account of all important determinants is misspecified, and thus must be used only for ...
A.
for reasons of English language style.
B.
because of personal reason of style.
C.
in order to highlight their importance.
D.
to help the reader avoid confusion.
【单选题】In the OECD countries, there is a negative relationship between output per capita in 1950 and
A.
growth since 1950.
B.
output per capita in the 1990s.
C.
distance from the equator.
D.
population.
E.
none of the above
【单选题】What qualifies a country for financial aid from IDA?
A.
A per capita income of more than $730.
B.
A per capita income of less than $410.
C.
A per capita income of more than ∮2,100.
D.
A per capita income of less than $730.
【单选题】物料的包装上必须有标签，注明了规定的信息，被污染了的要进行清洁，有影响物料质量的问题，要报告给( )。
A.
供应部门
B.
质量管理部门
C.
供应商
D.
质量管理负责人
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