A. but B. even though C. even so D. and yet
A. 黄白色膜样渗出物 B. 灰白色假膜 C. 白色乳凝块样物 D. 白色片状物 E. 黄白色小水疱
A. thought B. viewed C. defined D. assumed
A. decline B. refusal C. denial D. lack
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