欲了解水体污染物是否有富集作用，应监测 A．水生生物种群和数量的检测 B．生物体内残

如图，一带负电粒子以某速度进入水平向右的匀强电场中，在电场力作用下形成图中所示的运动轨迹。M和N是轨迹上的两点，其中M点在轨迹的最右点。不计重力，下列表述正确的是

A．粒子在M点的速率最大

B．粒子所受电场力沿电场方向

C．粒子在电场中的加速度不变

D．粒子在电场中的电势能始终在增加

下列选项中不属于境外投资项目申请报告的主要内容的是( )。

A．项目名称、投资方基本情况

B．项目背景情况及投资环境情况

C．项目总投资、各方投资额、出资方式、融资方案及用汇金额

D．项目名称、经营期限、投资方基本情况

阅读理解。

                                                    May: Happenings from the Past

     May 5,1884

     Isaac Murphy, son of a slave and perhaps the greatest horse rider in American history, rides Buchanan

to win his first Kentucky Derby. He becomes the first rider ever to win the race three times.

     May 9,1754

     Benjamin Franklin's Pennsylvania Gazette produces perhaps the first American political cartoon (漫画),

showing a snake cutsin pieces, with the words" Join or Dic" printed under the picture.

     May 11,1934

     The first great dust storm of the Great Plains Dust Bowl, the result of years of drought (干旱), blows

topsoil all the way to New York City and Washington, D.C.

     May 19,1994

     Jacqueline Lee Bouvier Kennedy Onassis, former first lady and one of the most famous people of the

1960s, died of cancer in New York City at the age of 64.

     May 24, 1844

     Samuel F.B Morse taps out the first message, "What Hath God wrought," over the experimental

long-distance telegraph line which runs from Washington, D,C, to Baltimore, Md.

1. We know from the text that Buchanan is _____.

A. Isaac's father

B. a winning horse

C. a slave taking care of horses

D. the first racing horse in Kentucky

2. What is the title of the first American political cartoon?

A. Join or Die

B. Pennsylvania Gazette

C. What Hath God Wrought

D. Kentucky Dorby

3. In which year did the former first lady Jacqueline die?

A. 1934

B. 1960

C. 1964

D. 1994

4. Which of the following places has to do with the first telegram in history?

A. Washington, D.C.

B. New York City.

C. Kentucky.

D. Pennsylvania.

甲房地产开发公司委托乙房地产公司代为预售其正在开发的商品房，乙公司代甲公司预售商品房时，未向购房人披露甲公司而直接以自己的名义与购房人签订了商品房预售合同。则甲公司开发的商品房延期竣工致使乙公司不能如期向购房人交房时，以下说法正确的是

A．乙公司应当向购房人披露甲公司，购房人可以选择要求甲公司或者乙公司承担违约责任

B．乙公司应当向购房人披露甲公司，购房人可以要求甲公司和乙公司承担连带违约责任

C．购房人起诉要求甲公司承担违约责任时，甲公司可以主张其对乙公司的抗辩

D．购房人起诉要求甲公司承担违约责任时，甲公司可以主张乙公司对购房人的抗辩、

月季花后的修剪一般是从花朵往下数，在地3～5片小叶的复叶上面约（）剪下。

A.5cm

B.3cm

C.1.5cm

D.0.5cm