若点(m,n)在函数y=2x+1的图象上，则2m-n的值是（） A．2 B．-2

Wang Yan, a 15-year-old Chinese girl, likes eating snacks very much. She prefers cream biscuits, McDonald’s food, KFC chicken. As a result, she has become overweight.

Today in China, there are many children like Wang Yan. Health experts say that children should have healthy eating habits. First, they must eat regular meals and begin with a healthy breakfast. Second, they should have different kinds of foods, such as fruit, vegetables, grain, eggs, milk and meat. Third, children shouldn’t eat too much junk food. It’s delicious, but eating it often is bad for their health. If children do as the experts say, they won’t become overweight. They will be healthier. Students won’t become tired at school, and they will have enough energy to study hard.

小题1:Why has Wang Yan become overweight?

A．Because she doesn’t like sports.

B．Because she likes eating vegetables

C．Because she likes eating snacks.

D．Because she likes eating fruit.小题2:How many pieces of advice do health experts give in this passage?

A．Two.

B．Three.

C．Four

D．Five.小题3: What kind of food are good for our health according to the passage?

A．Milk, fruit, KFC chicken.

B．Cream biscuits, McDonald’s hamburgers and KFC chicken.

C．Packages of biscuits.

D．fruit, vegetables, grain, eggs, milk and meat.小题4:What will be the result if we do as the experts say? We will be _________.

A．overweight.

B．healthier.

C．tired at school

D．confident.小题5: What does the writer think of junk food?

A．Terrible.

B．Healthy.

C．Unhealthy

D．Sweet.

校园安全不仅涉及到千家万户的幸福，而且关系到社会的稳定。有关部门在对安全事故的调查中发现，80％的学生发生意外的原因是缺乏安全防卫知识，自我保护意识和能力不强。下列自救措施中，面确做法是(    )。

①身处火场，应用毛巾捂住鼻，俯下身子顺楼梯通道向无火或火势较弱韵地方转移。  

②面对洪灾应尽快向高处转移

③熟记一些求救电话号码，如火警119、匪警110、急救120

④对校内外的不法侵害，要机智灵活地应对，告诉学校或家长，最好求助于法律。

A．①②③    B．①③④   

c．②③④    D．①②③④

某企业因为要扩大规模，需要招聘销售人员和管理人员。根据历史数据分析得知，销售人员数量y与销售额x（单位为万元）成线性相关关系y=a+bx，a、b分别是20，0.03。2013年该企业实现销售额1000万元，计划2014年实现销售额1500万元。通过往年数据统计得知，销售额每增加500万元，需要增加管理人员和销售员、客服人员共40名，新增人员中管理人员、销售人员、客服人员比例为1：6：3。根据以上资料，回答下列问题：

2014年该企业需要新增管理人员（）人。

A.4

B.3

C.2

D.1

行政仲裁，是行政机关或行政机关下设的专门机构以中立者身份，依法裁断与合同有关的民事纠纷的制度，随着我国市场经济的发展，行政机关逐步减少了对市场活动的宏观干预。

如图所示，a为带正电的小物块，b是一不带电的绝缘物块，a、b叠放于粗糙的水平地面上，地面上方有垂直纸面向里的匀强磁场，现用水平恒力F拉b物块，使a、b一起无相对滑动地向左加速运动，在加速运动阶段   （   ）

A．a、b一起运动的加速度不变

B．a、b一起运动的加速度增大

C．a、b物块间的摩擦力减小

D．a、b物块间的摩擦力增大