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问题 解答题

甲、乙、丙三个数的平均数是6，甲、乙两个数的平均数是4，乙、丙两个数的平均数是5.3。乙数是多少？甲、丙的平均数是多少？

答案

解：4 ×2 + 5.3 ×2 - 6 ×3 =0.6

     （6×3 - 0.6）÷2=8.7

听力题

用括号中所给单词的形式填空，使语篇意思完整，必要时请用否定式。（共10小题，每小题1分，满分10分）

In the modern world, advertising is everywhere! Some people think that ads _______(be) great. But others hate ads, saying that they make our ______(city) and countryside look ugly. It’s ________(truly) that some ads can be very useful. For instance, they can help you __________(compare) two different products and save money. When prices ________(list), you can go to the store with the ________(low) price. However, some advertising can be confusing or ___________(leading). Sometimes the picture in an ad looks a lot better than the real thing. At other times, the words _________(sounds) good but don’t really tell you anything about the quality of the product. So __________(your) have to be careful. __________(let) their words and pictures fool you.
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单项选择题

膀胱炎的特点不包括（）

A.急性细菌性膀胱炎，突然发病，膀胱刺激征明显

B.慢性细菌性膀胱炎，病程迁延，可急性发作

C.滤泡性膀胱炎，黏膜固有层内淋巴滤泡反应性增生

D.放射性膀胱炎，通常发生于放疗后3～6周

E.嗜酸细胞性膀胱炎有嗜酸性肉芽肿形成
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