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【判断题】
石料磨光值越大,其抗滑性越好。A.
正确
B.
错误
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【单选题】关于域名系统说法错误的是 。
A.
域名由若干标号序列组成
B.
权限域名服务器是负责一个区的域名服务器
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域名系统以层次树状结构命名
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【单选题】听力原文： A lot of people in the United States are coffee drinkers. Over the last few years, a trend has been developing to introduce premium specially blended coffees known as gourmet coffees into the Am...
A.
The coffee market in Boston.
B.
The role of supermarkets in the coffee business.
C.
A new trend in the United States.
D.
The advertising of a new product.
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