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【单选题】
患者,女性, 32 岁,月经量多 2 年,近 4 个月来感乏力、头晕、心悸,查血红蛋白 65g/L, 白细胞 6.0×109/1,血小板 140×109/L,骨髓象:红细胞增生活跃,中晚幼红细胞 45%,体 积小,胞浆偏蓝,治疗首选( )A.
肌注维生素 B12
B.
口服铁剂
C.
输血
D.
脾切除
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【简答题】正常燃烧时,影响火焰传播速度的是? ( ) 选择至少一个答案
【简答题】阅读理解。 Sam likes eating fish very much. He often buys fish in the shop and takes them home. One day his wife sees the fish and thinks, 'Good! Now, I can ask my friends to have lunch and we can eat the ...
【单选题】The combinations of gasoline and coffee along one of Sam's indifference curves are combinations
A.
which require the same total expenditure.
B.
that he can afford with his $60.00 income.
C.
among which he is indifferent.
D.
that give him the same marginal rate of substitution.
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