下列有关实验课题与相应方法的叙述,错误的是[ ] A.细胞膜的制备利用蒸馏水使哺

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问题:

下列有关实验课题与相应方法的叙述,错误的是[ ]

A.细胞膜的制备利用蒸馏水使哺乳动物的红细胞吸水涨破

B.分离细胞器利用了差速离心法

C.观察线粒体利用甲基绿染液将线粒体染成绿色,再用显微镜观察

D.研究分泌蛋白质的合成与分泌,利用了放射性同位素标记法

考点:实验:用高倍显微镜观察叶绿体和线粒体实验:体验制备细胞膜的方法各种细胞器的结构和功能
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阅读理解。

     A young woman was walking through a supermarket to pick up a few things when she noticed an old man following her around. Thinking nothing of it,she ignored him and continued (继续)  shopping. After she got what she wanted, she went to checkout line,but the old man got in front of her,"Pardon me," he said,"I'm sorry if my staring(盯) at you has made you feel uncomfortable. It's just because you look like my granddaughter,who just died recently. And I miss her very much, "

     "I'm very sorry," answered the young woman. "Is there anything I can do for you?"

     " Yes,"  the old man said. " As I'm leaving,can you say ‘Goodbye,Grandpa' to me? It would make me feel so much better. "

     "Sure," answered the young woman.

     As the old man was leaving,she called out, " Byebye,Grandpa ! "

     When she stepped up to the checkout counter(收银台) ,she saw that her total was $ 178.50.

     "How can that be?" she asked. "I only bought a few things ! "

     "Your grandpa said you would pay for him," said the clerk.

1.Why did the old man follow the woman and let her say" Bye-bye,Grandpa" ?     

A. He wanted to steal(偷) her money.

B. She looked like her dead granddaughter.

C. He wanted to stare at her.

D. He wanted her to pay for him.

2. According to the passage we can know that              .    

A. the young woman is a careful person .

B. the young woman is as clever as the old man

C.the young woman was pleased to pay for the old man

D. the young woman didn't know the old man at all

3. What does the word "ignored" mean?

A. 看  

B. 浏览  

C. 忽视  

D. 买

4. How much did it cost what the young woman bought? 

A. $ 178.50.                    

B. Over $ 178.50.

C. $ 78. 50.                    

D. Less than $ 178. 50.

5. Which of the following is the best title of the story?

A. A kind-hearted young woman

B.The total was $178.50

C. Bye-bye,Grandpa

D. An old man and his granddaughter       

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PR间期固定,P波后均有QRS波, PR间期>0.20秒见于

A.一度房室传导阻滞
B.二度Ⅰ型房室传导阻滞
C.二度Ⅱ型房室传导阻滞
D.三度房室传导阻滞
E.室内传导阻滞

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底部供气元件为什么会损坏?

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进行双侧唇裂整复术最适合的年龄为( )

A.出生后即刻
B.1~2个月
C.3~6个月
D.6~12个月
E.1~2岁

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蓄在师生沟通中经常起以下几方面的作用()

A、曲表观点

B、巧避锋芒

C、暗示批评

D、美化语言

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