皮皮学，免费搜题
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【单选题】
患儿男，8岁，幼小时即有贫血，近1年反复咳嗽、少量咯血、气短、乏力，有时伴发热。此次又因咯血复发就诊。查体呼吸增快，面色苍白，皮肤无皮疹及出血点，巩膜轻度，两肺中下野可闻湿啰音，呼吸音减低，除心率略增快外，心脏检查正常。肝脾肿大。实验室检查显示缺铁性贫血，血清胆红素轻度升高，胃液中吞噬含铁血巨噬细胞，胸片及CT片示两中下肺野片状磨玻璃影及小结节影。血小板及出、凝血机制正常。尿常规及肾功能正常。最可能的诊断是（）A.
心脏瓣膜病
B.
Goodpasture综合征
C.
血小板减少性紫癜
D.
特发性肺含铁血沉着症
E.
系统性红斑狼疮
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皮皮学刷刷变学霸
举一反三
【单选题】One reason that the quantity demanded of a good tends to rise as its price falls is that:
A.
the decrease in price shifts the supply curve downward.
B.
people feel a bit richer and increase their use of the good.
C.
demand has to rise to restore equilibrium after a price reduction.
D.
suppliers are willing to supply more at lower prices.
E.
the decrease in price shifts the demand curve upward.
【单选题】The average price of milk products is expected to rise considerably in the next month due to the_____costs a ssociated with dairy farming.
A.
decreased
B.
increased
C.
approach
D.
impress
【单选题】A good is called an inferior good if sales______.
A.
are unaffected by income
B.
rise as price increases
C.
decline as price increases
D.
decline as income increases
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