【单选题】According to the news item, the Occupy movement condemns the countrys______.
【简答题】Although labor unions in the U.S. have been able to keep up their membership numbers over the last two decades, they have been losing their political strength. (keep up) ____________
【判断题】酸洗过程中产生的腐蚀主要是化学腐蚀。()
【单选题】The UN’s goal is to end child labor by__________.