现行增值税规定，纳税人的一项销售行为如果既涉及货物又涉及非应税劳务，称为 ( )。
A. 兼营行为
B. 混合销售行为
C. 提供应税劳务行为
D. 提供非应税劳务行为
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The famous line "If winter comes, can spring be far behind" is from ______'s poem "Ode to the West Wind".
A. George Gordon, Lord Byron
B. Percy B．Shelley
C. Samuel T. Coleridge
D. John Keats
He first became aware of a racial disparity because of ______.
A. the vagueness of his African ancestry
B. the unfair treatment of him at school
C. the miserable sufferings of the slaves
D. the inhibitions haunting his parents
治疗与抢救休克首要的中心环节为
A. 应用血管活性药
B. 应用纠酸药物
C. 消除病因补充血容量
D. 应用肾上腺皮质激素
E. 应用肝素防止DIC
男性，3岁，Fallot四联症患者，查体：口唇发绀，该患者的发绀属于
A. 肺性发绀
B. 心性混合性发绀
C. 淤血性周围性发绀
D. 缺血性周围性发绀
E. 混合性发绀
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