下列项目中，属于所有者权益项目的有（）。A.其他综合收益 B.专项储备 C.库存股

我国“嫦娥一号”月球探测器在绕月球成功运行之后，为进一步探测月球的详细情况，又发射了一颗绕月球表面飞行的科学实验卫星。假设卫星绕月球做圆周运动，月球绕地球也做圆周运动，且轨道都在同一平面。已知卫星绕月球运行的周期为T₀，地球表面重力加速度为g，地球半径为R₀，月心到地心间的距离为r₀，引力常量为G，试求：

(1)月球的平均密度；

(2)月球绕地球运行的周期。

西藏在（）朝代成为我国正式行政区。

A．秦

B．汉

C．唐

D．元

三、阅读理解（共两节，40分）

第一节（共15小题；每小题2分，共30分）

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

A

One warm May day, two eighteen – year – old students from San Francisco State College decided to cool off with a swim at Bakers’ Beach. The two students were named Robert Kogler and Shirley O’Neill. They headed out to sea for a distance of 50 metres. Robert was in front.

“Suddenly, I heard him scream,” Shirley recalls. “I looked round and saw this great grey thing going up in the air. The water seemed to be alive.”

Robert sereamed again. “It’s a shark! Get out of here!”

An eye – witness, Army Sergeant Leo P. Day was on guard at the nearby army post. He saw exactly what happened next. “I could see this boy struggling with the shark in the water,” he said. “The sea was red with blood. He was shouting and signalling someone to go back, go back. Then I saw the girl. She was swimming towards him. She completely ignored his warning.”

Shirley reached Robert, and tried to take his hand.

“When I pulled, all I could see was his arm, handing by a thread,” she said.

So she put her arm about Robert’s back, and started to swim towards the shore. She kept praying “Don't’ let it attack again!” That journey to the shore seemed to last for hours. At last, as they neared the shore, a fisherman threw them a line, and pulled them both the rest of the way.

The young man had lost a lot of blood, and died two and a half hours later, From the teeth marks, experts identified the attacker as a Great White Shark.

For what Sergeant Day called “the greatest exhibition of bravery I have ever seen,” the President of the US gave Shirley a medal for bravery.

56．When Albert was attacked by a shark Shirley         .

A．was swimming in the sea

B．was watching him on the shore

C．was on guard at the nearby army post

D．was shouting and struggling with a shark, too

57．Choose the right time order of the following events in the story.

a. Army Sergeant saw the girl swimming to the boy.

b. Shirley saw a great grey thing.

c. They headed out to sea.

d. Robert died.

e. A fisherman threw them a line.

f. He saw a boy struggling with a shark.

A．b,c,e,d,f,a B．c,a,f,d,e,b C．b,c,f,a,d,e D．c,b,f,a,e,d

58．We can learn from the passage that          .

A．the two students were brave and considerate

B．the fisherman was adventurous and helpful

C．the experts didn’t do much research on sharks

D．the Sergeant cared too much about his own life

移植器官超急排斥反应是由于

A．供体内预存有抗受体的ABO血型抗体
B．供体内预存有抗受体的HLAⅠ类抗原的抗体
C．受体内预存有抗供体的ABO血型抗体
D．受体内有针对供体组织器官的TC细胞
E．供受者HLA配型不符

噬菌体感染实验中，为什么说DNA是噬菌体的遗传物质