为了驳斥“亡国论”和“速胜论”的错误观点，系统阐述党的抗日持久战方针，毛 * * 于193

人从高处跳到较硬的水平地面时，为了安全，一般都是让脚尖先触地且着地时要弯曲双腿，这是为了（　　）

A．减小地面对人的冲量

B．减小人的动量的变化

C．增加地面对人的冲击时间

D．增大人对地面的压强

下列能鉴别老年痴呆与老年抑郁的症状是（）。

A.痴呆

B.情绪低落

C.少言寡语

D.书写障碍

E.躁狂

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.

取某-巴比妥类药物约0．2g，加氢氧化钠试液5ml，与醋酸铅试液2ml，即生成白色沉淀，加热后沉淀变为黑色，该药物应为（）

A.异戊巴比妥

B.苯巴比妥钠

C.司可巴比妥钠

D.硫喷妥钠

E.苯妥英钠

Would you mind（）your DF?

A.My using

B.I use

C.To use

D.I will use