【判断题】幼儿的活动室和卧室要经常开窗,通风换气。这是属于空气消毒。(1.0分)

A.题幼【简答题】焊接接头拉伸试验的目的和国家标准?
B.活动【填空题】简述胸外按压的方法和注意事项?
C.室和属【阅读理解(选择)/完型填空】Scholars of the information society are divided over whether social inequality decreases or increases in an information-based society. However, they generally agree with the idea that inequality in the information society is ( 1 ) different from that of an industrial society.As information progresses in society, the cause and structural nature of social inequality changes as well. It seems that the information society ( 2 ) the quantity of information available to the members of a society by revolutionizing the ways of using and exchanging information.But such a view is a ( 3 ) analysis based on the quantity of information supplied by various forms of the mass media.A different ( 4 ) is possible when the actual amount of information ( 5 ) by the user is taken into account.In fact, the more information ( 6 ) throughout the entire society, the wider the gap becomes between "information haves" and "information have-mots", leading to digital divide. According to recent studies, digital divide has been caused by three major ( 7 ) class, sex, and generation.In terms of class, digital divide exists among different types of workers and between the upper and middle classes and the lower class.With ( 8 ) to sex, digital divide exists between men and women.The greatest gap, however, is between the Net-generation, ( 9 ) with personal computers and the Internet, and the older generation, ( 1 0 ) to an industrial society.
D.卧室【计算题】Mg ( OH ) 2 在298.15K 时的 Ksp 是5.61*10 -12 ,求其在在纯水中的 pH 值。