实验测定：

①称取一定质量的样品加入稀盐酸中充分溶解，将所得溶液转移至容量瓶并配制成100mL溶液A；

②量取25.00mL溶液A，加入盐酸酸化的BaCl₂溶液至沉淀完全，过滤、洗涤、干燥至恒重，得到白色固体4.66g；

③量取25.00mL溶液A，加入足量KI，用1.000mol•L^﹣1Na₂S₂O₃溶液进行滴定（已知反应为I₂+2Na₂S₂O₃═2NaI+Na₂S₄O₆），消耗30.00mL Na₂S₂O₃溶液至终点．

两个非零向量$\overrightarrow{a}$、$\overrightarrow{b}$满足|$\overrightarrow{a}$|=|$\overrightarrow{b}$|=|$\overrightarrow{a}$+$\overrightarrow{b}$|，则$\overrightarrow{a}$﹣$\overrightarrow{b}$与$\overrightarrow{a}$所成的角是（　　）

2015年4月1日，公安部会同中央纪委监察部组织开展“猎狐2015”专项行动，重点对象是外逃经济犯罪嫌疑人、外逃党员和国家工作人员、涉腐案件外逃人员。截至10月31日，公安部通过国际执法合作渠道共从63个国家和地区抓获各类外逃人员627名。下列选项对一专项行动分析正确的是（    ）

①公安部作为司法机关保障我国的经济安全

②党积极履行国家职能，促进党的先进性和纯洁性建设

③政府履行了保障人民民主和维护国家长治久安的职能

④为今后我国与世界各国深化国际警务合作、创新合作方式提供了成功借鉴

My father is tall，but I am      ．    

    China dropped its decades-long, one-child policy last year to allow each family to have two children. This change has put 270 million married women of childbearing age in the position of choosing between family and work. The employers also face big challenges as more female workers will have two maternity leaves(产假) for a total of seven to eight months.

    In a survey published by classified advertising website Ganji.com, career women who might be considering having a second child were asked what kinds of pressure they might expect. More than 76 percent of the women who were questioned mentioned concerns about the financial burden of raising two children, while more than 71 percent said it would be difficult to balance career and family. In addition, nearly 56 percent said that having a second child would definitely have a negative effect on their career.

    Another survey conducted by Chongqing-based human resources website job.cq.qq.com found that over 70 percent of job seekers believe that having a second child would make females less popular in the job market, although two-thirds of the employers said the policy will make no difference in their employment of staff.

    Feng Lijuan, s senior expert on human resources at 51 job.com, a leading Chinese job finding platform, said she would not say “there is prejudice against career women.” Feng said Chinese women shoulder more family responsibility. “It is not only about maternity leave; a female employee might only fully get back to work after three to five years after having her first child.”

    Wang Yixin, a senior employment adviser, said the positive side is that more companies are trying to attract more talents by providing support to career women. “Different from before, it is not only employers choosing employees. Many talents, including professional career women, also choose employers.” said Wang. “According to our survey, many large companies are very open to their employees' choice of having a second child.”