题目

According to a survey, in Washington, DC, only 69 percent of public school students graduate from high school on time. Many factors influence that low rate. One of the most important ones is whether the people around the students expect them to succeed.So, for the past 40 years, a DC organization has stepped in to give around 10,000 students the support and positive environment they need to thrive. This organization, called Higher Achievement, provides students with a welcoming space, help with class work, and caring teachers. More than 95 percent of students who complete Higher Achievement gr抗日民族统一战线正式建立的标志是A. 西安事变和平解决B. 中共召开瓦窑堡会议C. 国民政府发表国共合作宣言D. 中国工农红军改编为国民革命军