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问题 单项选择题

不属于降低乳腺癌发生危险性的措施是（）

A.青春期适当节制脂肪和动物蛋白质的摄入

B.避免不必要的电离辐射

C.实行人工喂养

D.更年期尽量避免应用雌激素

E.更年期后适当增加体育活动，减少过剩脂肪

答案

参考答案：A

单项选择题

WebSQL is a SQL-like (26) language for extracting information from the weB. Its capabilities for performing navigation of web (27) make it a useful tool for automating several web-related tasks that require the systematic processing of either ail the links in a (28) , all the pages that can be reached from a given URL through (29) that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (30) Interface.

A．query

B．transaction

C．communication

D．programming
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选择题

元素周期表和元素周期律可以指导人们进行规律性的推测和判断．下列说法错误的是（　　）

A．若X+和Y2-的核外电子层结构相同，则原子序数：X＞Y

B．硅、锗都位于金属与非金属的交界处，都可以做半导体材料

C．由水溶液的酸性：HCl＞H2S，可推断出元素的非金属性：Cl＞S

D．Cs和Ba分别位于第六周期IA和IIA族，碱性：CsOH＞Ba（OH）2
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