In the last paragraph, "play down their visibility" refers to ______.
A. "show off"
B. "be very modest"
C. "not show them"
D. "to debase themselves"
The author's purpose of writing this passage is to ______.
A. explain why people have emotions
B. show how people avoid the negative emotions
C. explain what people should do before emotions
D. define and classify people's emotions
对急性肾小球肾炎最具有诊断价值的实验室指标是( )
A. 轻度贫血
B. 外周血白细胞计数增高
C. 血沉增快
D. 抗链球菌溶血素"O"(As0)增高
E. 血清总补体及C3-过性明显下降
为明确诊断，待生命体征平稳后进一步检查宜选择
A. 上消化道钡餐
B. 消化系统B超
C. 纤维胃镜
D. 腹部CT
E. 选择性腹腔动脉造影
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