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问题 单项选择题

慢性支气管炎急性发作伴细菌感染时，最主要的临床表现是

A．咳嗽加重

B．咳白色泡沫痍与粘液痰

C．肺底部有细湿啰音

D．肺部有哮鸣音

E．咳脓性痰且痰量增加

答案

参考答案：E

填空题

在一个袋子里装有10个球，其中6个红球，3个黄球，1个绿球，这些球除颜色外，形状、大小、质地等完全相同，充分搅匀后，在看不到球的条件下，随机从这个袋子里摸出一球，不是红球的概率是（    ）。
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单项选择题

Advertisement: We at Vesuvius Vacuums always give our customers what they deserve, and they deserve the very best. That’s why we use only SuperTec air filters.
Which of the following, if true, would most undermine the argument expressed in the advertisement ？（）

A. In a test of three leading air filters, the SuperTec air filter performed at the same level as one of the filters and at a higher level than the other.

B. The SuperTec air filter is the only kind of air filter that will fit in the model of vacuum sold by Vesuvius Vacuums.

C. In a national study by a prominent consumer group, Vesuvius Vacuums gained a "superior" rating for product quality.

D. The customers of Vesuvius Vacuums have expressed no preferences concerning the type of air filter used in the product.

E. The specific air filter used in a given vacuum makes only a small difference in the long-term performance of that vacuum.
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