社会工作者开展的维护青少年合法权益方面的专业服务内容包括()。
A、困难帮扶
B、思想引导
C、权益保护
D、法律服务
E、心理疏导
参考答案:A, C, D, E
用惰性电极电解一定浓度的CuSO4溶液,一段时间后停止电解,向所得的溶液中加入0.2 mol Cu(OH)2后恰好恢复到电解前的原样, 则电解过程中共转移的电子数是 [ ]
A.0. 8NA
B.0.6NA
C 0.5NA
D.0.4NA
How should you signal the crane operator to raise the boom?().
A.Extend arm with the thumb pointing up and flex the fingers in and out
B.Place both fists in front of the body with the thumbs pointing upward
C.With forearm vertical and forefinger pointing up,move hand in small horizond circles
D.Extend arm with the fingers closed and thumb upward