电子邮件通常使用的协议有（）。 A.SMTP和POP3 B.SMTP和RMON C.

弱势群体指（）

A.承受外界冲击的能力弱的群体，包括生理的也包括社会性的

B.生活处境，生存状态恶劣的群体

C.专指残疾人群和女性

D.在某一社会生活结构中处于不利地位的群体

阅读下列材料：

材料一：1862年，一路由左宗棠指挥的湘军进攻太平军。几个月后，湘军围攻天京。1864年，天京陷落。

材料二：1875年，清政府任命左宗棠为钦差大臣，专门负责新疆军务。经过一番准备，1876年，左宗棠率军兵分三路，进入新疆，开始了收复新疆的斗争。

材料三：1866年，左宗棠在福州马尾成立福州船政局，这是设备最齐全的一个船舶制造厂，该厂还附设船政学堂。

请回答：

结合上述材料，对左宗棠这个人物，我们应该怎样评价？

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矩阵

的非零特征值是______．

产生的经济利益很可能流入企业所说的“很可能”是指（）。

A.可能性大于50%

B.可能性大于95%

C.可能性大于50%小于95%

D.可能性大于50%小于等于95%

Passage 1 Changes in educational approaches, beliefs and practices come faster today than most teachers, parents and children can begin to assimilate. Speedy results are seen as politically necessary. When new approaches are not successful immediately, they are abandoned in favor of even newer ones. // In repeated and accelerated cycles of change it is the children who suffer. Hurried through the school day and through the grade levels, they are left with little time to reflect on what they are learning or where their lives are beaded. Our schools tend to be fact factories, cramming more into every minute of every hour of every day. There always seems to be more curriculum to cover and more tests to take—but never any time added to the day. Children and teachers are left gasping for air. // We must stop hurrying children and give them adequate time for learning. We need more clarity, more planning and less impulsive implementation of "the latest best thing." There is an urgent need in our schools for increased accountability and more focused attention on basic skills. But that very urgency must not lead us to rush. The pace of change must be reasonable and related to the right pace for children’s learning. // True learning requires time: time to wonder, time to share and time to pay attention to what is most important. To hurry through classes and a predetermined timetable of achievements is contrary to the nature of children and will do irreparable damage to their minds and souls. School comes from the Greek word scholé which translates literally as "leisure." Consider how far we’ve moved from our educational roots! //