题干

下图是1950﹣1970年主要资本主义国家经济年均增长统计图。由此我们可以得出的正确信息是(    )

A:美国失去了世界经济霸主的地位

B:联邦德国成为第二号资本主义经济大国

C:西欧各国经济迅速恢复持续繁荣

D:日本实行“科技立国”促进经济飞速发展

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答案(点此获取答案解析)

C

同类题1

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When milk arrived on the doorstep

    When I was a boy growing up in New Jersey in the 1960s, we had a milkman delivering milk to our doorstep. His name was Mr. Basille. He wore a white cap and drove a white truck. As a 5-year-old boy, I couldn't take my eyes off the coin changer fixed to his belt. He noticed this one day during a delivery and gave me a quarter out of his coin changer.

    Of course, he delivered more than milk. There was cheese, eggs and so on. If we needed to change our order, my mother would pen a note-“Please add a bottle of buttermilk next delivery”-and place it in the box along with the empty bottles. And then, the buttermilk would magically appear.

    All of this was about more than convenience. There existed a close relationship between families and their milkmen. Mr. Basille even had a key to our house, for those times when it was so cold outside that we put the box indoors, so that the milk wouldn't freeze. And I remember Mr. Basille from time to time taking a break at our kitchen table, having a cup of tea and telling stories about his delivery.

    There is sadly no home milk delivery today. Big companies allowed the production of cheaper milk, thus making it difficult for milkmen to compete. Besides, milk is for sale everywhere, and it may just not have been practical to have a delivery service.

    Recently, an old milk box in the countryside I saw brought back my childhood memories. I took it home and planted it on the back porch (门廊). Every so often my son's friends will ask what it is. So I start telling stories of my boyhood, and of the milkman who brought us friendship along with his milk.

同类题5

Ⅰ.科学家往小球藻培养液中通入14CO2后,分别给予小球藻不同时间的光照,结果如下表:

实验组别

光照时间(s)

放射性物质分布

1

2

大量3﹣磷酸甘油酸(三碳化合物)

2

20

12种磷酸化糖类

3

60

除上述12种磷酸化糖类外,还有氨基酸、有机酸等

根据上述实验结果分析,回答下列问题:

(1)本实验利用小球藻研究的是光合作用的____  阶段.

(2)每组照光后需将小球藻进行____  处理,才能测定放射物质分布.

(3)CO2进入叶绿体后,最初形成的物质是____  .

(4)实验结果说明光合作用产生的有机物包括____ .

Ⅱ.为了探究不同条件对植物光合速率和呼吸速率的影响,用8株都具有20片叶片、且大小长势相似的某种盆栽植株,分别放在密闭的玻璃容器中,在不同条件下利用传感器定时测定密闭容器中二氧化碳的含量,实验结果统计如下表:

编号

1

2

3

4

5

6

7

8

温度(℃)

10

10

20

20

30

30

40

40

光照强度(lx)

1000

0

1000

0

1000

0

1000

0

开始时CO2量(g)

5.0

5.0

5.

5.0

5.0

5.0

5.0

5.0

12hCO2量(g)

4.5

5.1

3.5

5.4

1.9

5.9

2.0

5.8

(1)编号为1、3、5、7的装置可构成一个相对独立的实验组合,在该实验组合中,自变量是____  ,无关变量是____  (至少答2个)

(2)编号为2、4、6、8的装置可构成一个相对独立的实验组合,该实验组合的目的是探究____ 

(3)在编号为2的装置中,叶肉细胞产生ATP的场所是 ____ .

(4)科研人员在该植株幼苗中发现了一株叶黄素缺失突变体,将其叶片进行红光照射光吸收测定和色素层析条带分析,与正常叶片相比,实验结果是:光吸收差异____ (填“显著”或“不显著”),色素带缺少第____  条(从上至下).