在青海省建立的青海湖鸟岛自然保护区，主要保护动物是（） A．金丝猴 B．朱鹮 C

I am sorry I can’t meet you at the station. I _____ by the time you come back from abroad.

A．am leaving

B．had left

C．will have left

D．have left

现场判断病人心跳骤停的可靠指征是（）。

A.面色紫绀

B.自主呼吸停止或呈抽泣样呼吸

C.大动脉搏动消失

D.不能言语

E.瞳孔散大

数字式液体压强计由薄片式压强传感器和数据采集显示器两部分组成。如图甲所示，将传感器放在大气中调零后，放入浮有圆柱体A的圆柱形水槽底部，用它来测量水槽底受到水的压强。然后在圆柱体A上逐个放上圆板，水槽底受到水的压强与所加圆板个数的关系如图乙所示。

已知圆柱体的底面积S=0.02m²，圆柱体的密度ρ_A=0.75×10³kg/m³。所有的圆板完全相同，圆板与圆柱体A的底面积相等，厚度d =5mm，g取10N/kg。根据以上数据计算，一个圆板的质量m₁与圆柱体A的质量m_A的比值m₁:m_A=______。

阅读理解

     A famous teacher was speaking to the students at our school. He began his lesson by holding up a ￥

100 bill. Then he said to the three hundred students, "Who would like this ￥100 bill?" The students

began to put up their hands at once.

     Then he said, "I am going to give this ￥100 to one of you, but first, let me do this." He then made the

bill into a ball. Then he said, "Who wants it now?" The hands went back into the air.

     " Well," he said, "What if I do this?" and he dropped it on the floor and stepped on it. He picked up

the dirty, crumpled bill and said, "Who still wants it?" Hands went back into the air.

     "My friends," he said, "you have learned a valuable lesson today. No matter what I did to the money,

you still wanted it because it did not go down in value. It was still worth ￥ l00!"

     Many times in our lives, we are dropped, crumpled, and stepped on by the chances we take and the

things that happen to us. We feel as if we are worth nothing. But remember, no matter what has happened to you, you will never lose your value: you are always valuable to those people who love you. Your value

doesn't come from what you do or whom you know, but WHO YOU ARE.

     You are special and valuable. Don't ever forget it!

1. Even though it was dirty, the money _______.

A. still went up in value  

B. was worth nothing  

C. didn't go down in value  

D. was still ours

2. We are always valuable to the people _______.

A. who pay us

B. who call us

C. who hate us

D. who love us

3. Your value doesn't come from what you do but _______.

A. who you know

B. who made you    

C. who you remember

D. who you are

4. The sentence "Hands went back into the air" means "_______".

A. the students put up their hands again    

B. the students put down their hands

C. the students put their hands behind their backs again

D. the students put their hands in front of them

5. Why did the famous teacher use a ￥100 bill at his lesson?

A. Because he wanted to make the bill into a ball.

B. Because he used to drop a bill on the floor and stepped on it.

C. Because he was going to give the bill to one of his students.

D. Because he wanted to make the students know what value was.