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【单选题】
What is the fundamental cause of neonatal respiratory distress syndromeA.
prematurity
B.
diabetes mellitus during pregnancy
C.
perinatal asphyxia
D.
pulmonary surfactant deficiency
E.
intrauterine infection
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A.
are not
B.
were hardly
C.
were nearly
D.
were only
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A.
the Romans
B.
the Greeks
C.
the Americans
D.
the French
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【简答题】Twelve puplis were killed and five__injured after gunmen attacked the school during lunchtime. Acritically Benormously Cgreatly Dhard