题目内容：
第(40)题应填__________ 参考答案：
答案解析：
单选题：第(40)题应填__________
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The passage mainly discusses________
The passage mainly discusses________A．the disadvantages of pennies B．the cost o
The document stresses the need to drink water every day to
The document stresses the need to drink water every day to stay properly hydrat
较常出现杵状指（趾）的呼吸系统疾病是
较常出现杵状指（趾）的呼吸系统疾病是A．慢性支气管炎 B．阻塞性肺气肿 C．支气管哮喘 D．支气管扩张症 E．支原体肺炎
Questions are based on the following passage.More and more
Questions are based on the following passage.More and more, the operations o
第(45)题应填__________
第(45)题应填__________