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问题 单项选择题

砌体房屋伸缩缝的间距与（）无关。

A．砌体的强度等级

B．砌体的类别

C．屋盖或楼盖的类别

D．环境温差

答案

参考答案：A

解析：

砌体房屋伸缩缝的间距与砌体的强度等级无关

单项选择题

A four-character password consists of one letter of the alphabet and three different digits between 0 and 9, inclusive. The letter must appear as the second or third character of the password. How many different passwords are possible ？（）

A.5，040

B.18，720

C.26，000

D.37，440

E.52，000
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