核电厂生产的电能是由（ )转化而来的,电茶壶能把电能转化成（ ).

核电站用的是天然铀,存在于自然界,首先通过地质找矿,找到铀矿石,再经过矿山开采把矿石采出来,然后选矿加工提取初级产品,送到核燃料厂进行加工提纯制成核燃料组件,根据需求制成各种不同规格的核燃料组件就可以使用了.

利用反应堆中核燃料裂变时产生的热量,使水变成蒸汽,这个过程与常规火电站相似,因此也有将反应堆成为“核锅炉”.

No Need for Panic Buying
Not long ago, a major earthquake hit Japan, which not only led to the explosion in a nuclear power plant, but also a wave of buying salt in China.
Why did people rush to buy salt? One reason is that many people believed rumors that iodized salt could prevent the hurt of radiation. As a result, they rushed to buy salt. Other people worried about an increase of price so they followed. Another reason is the lack of common sense among the public. As we know, it is not helpful enough to guard against radiation even by taking larger amounts of salt than usual.
So in my opinion, panic buying of salt is absolutely unnecessary.

略

解题思路：人类遗传病的遗传方式：根据遗传系谱图推测，“无中生有”是隐性，“无”指的是父母均不患病，“有”指的是子代中有患病个体；隐性遗传看女病，后代女儿患病父亲正常的话是常染色体遗传．“有中生无”是显性，“有”指的是父母患病，“无”指的是后代中有正常个体；显性遗传看男病，儿子正常母亲患病为常染色体遗传，母女都患病为伴X染色体遗传．母亲和女儿都正常，遗传病只在男子之间遗传的话，极有可能是伴Y染色体遗传．据此解答．

（1）已知侏儒症是常染色体显性遗传病，由于Ⅰ3、Ⅰ4无显性致病基因，在一般情况下不会产生侏儒症的后代，Ⅱ3致病基因来自于基因突变，I-3胜诉的可能性较大．
（2）①由于5号和6号正常，后代10号患病，因此该病为隐性遗传．
②该病为隐性遗传，II-6号不携带致病基因，则此病为伴X染色体隐性遗传，III-8号的基因型为X^AX^a，III-9号的基因型是X^AY，生一个男孩的基因型有X^AY或X^aY，不患病的概率是[1/2]．
③若II-6号携带致病基因，则此病为常染色体隐性遗传，III-8号的基因型为Aa，III-9号的基因型是[1/3]AA、[2/3]Aa，生一个患病男孩的概率是[2/3]×[1/4]×[1/2]=[1/12]．
故答案为：
（1）Ⅰ3由于Ⅰ3、Ⅰ4无显性致病基因，在一般情况下不会产生侏儒症的后代，Ⅱ3致病基因来自于基因突变（2）①隐②XX^AX^a[1/2]
③常[1/12]

点评：
本题考点： 常见的人类遗传病；伴性遗传．

考点点评： 此题主要考查人类遗传病的相关知识，意在考查学生对基础知识的理解掌握．

（1）76.5%
（2）103；4（精确到整数）

A.干电池.
光电池是光能转化为电能,核电站是核能转化为电能,三峡水站是水能转化为电能.

压水堆核电厂的主要特点如下:第一,结构紧凑,堆芯的功率密度大.因此,在体积相同的情况下,热堆中压水堆的功率最大.第二,基于上述特点,再加上轻水的价格便宜,导致压水堆的基建费用低和建设周期短.第三,必须采用有一定富集度的核燃料.第四,反应堆堆芯置于承压的压力容器内,高压导致压力容器的制作难度和制作费用的提高.第五,热效率低.

1,2是光能转电能,3是核能转电能

最高效的能量利用是氢到氦的聚变反应,此时会有大约千分之七的物质转化为能量,其他的聚变反应都不能与之媲美.核电厂使用的是铀或者钚的裂变反应,这种裂变反应的实际质能转换比例非常低,但是由于物质转化后的能量很大,...

8级

One possible version :
No Need for Panic Buying
Last year, a major earthquake hit Japan,which not only led to the explosion in a nuclear power plant,
but also a wave of buying salt in China.
Why did people rush to buy salt? One reason is that many people believed rumors that iodized salt
could prevent the hurt of radiation. As a result, they rushed to buy salt.Other people worried about an
increase of price so they followed. Another reason is the lack of common sense among the public. As we
know, it is not helpful enough to guard against radiation even by taking larger amounts of salt than usual.
So in my opinion, panic buying of salt is absolutely unnecessary.

解题思路：（1）根据碘化钾的化学式和元素质量分数的定义回答．
（2）求出1片碘片中碘的质量，再根据碘盐中碘的含量求出与之含碘元素质量相当的碘盐的质量．

（1）碘化钾的化学式为KI，碘化钾中碘的含量=[127/127+39]×100%=76.5%．
（2）1片碘片中碘的质量=0.15g×90%×76.5%=0.103g=103mg，130mg÷25.8mg/公斤=4公斤．
故答案为：（1）76.5%、（2）103、4．

点评：
本题考点： 有关化学式的计算和推断；元素的质量分数计算；人体的元素组成与元素对人体健康的重要作用．

考点点评： 化学式是最重要的化学用语之一，应用广泛，是考查的重点和热点，理解化学式及相关定义的含义，掌握相关计算的方法，问题就会迎刃而解．

No Need for Panic Buying
Last year, a major earthquake hit Japan，which not only led to the explosion in a nuclear power plant, but also a wave of buying salt in China.
Why did people rush to buy salt? One reason is that many people believed rumors that iodized salt could prevent the hurt of radiation. As a result, they rushed to buy salt.Other people worried about an increase of price so they followed. Another reason is the lack of common sense among the public. As we know, it
is not helpful enough to guard against radiation even by taking larger amounts of salt than usual.
So in my opinion, panic buying of salt is absolutely unnecessary.
(答案不唯一)

One possible version :
No Need for Panic Buying
Last year, a major earthquake hit Japan,which not only led to the explosion in a nuclear power plant,
but also a wave of buying salt in China.
Why did people rush to buy salt? One reason is that many people believed rumors that iodized salt
could prevent the hurt of radiation. As a result, they rushed to buy salt.Other people worried about an
increase of price so they followed. Another reason is the lack of common sense among the public. As
we know, it is not helpful enough to guard against radiation even by taking larger amounts of salt than
usual.
So in my opinion, panic buying of salt is absolutely unnecessary.

广岛原子弹为2万吨当量,装填钚6.1公斤.一个100万千瓦容量的核电站共装填80吨的二氧化铀年消耗三分之一的燃料这样算来约合4371个广岛原子弹.

同等发电量的核电厂,包含辐射在内,以及排硫化物,碳化物的污染,只有火电厂的百分之一.实话说,你家附近如果有一家火电厂,那些煤的矿物辐射会比核反应堆外墙测到的辐射高上几百倍.

主要是区别是水处理主要是阴阳床和混床的树脂不一样,核电厂的水处理过滤树脂具有较高的放射性,树脂需要进行压缩固化处理；而火电厂则不需要对放射性进行特殊处理.

来自设施、烟羽和地面沉积的外照射
烟羽中放射性物质的吸入引起的内照射
衣服和皮肤上的沉积物可能引起的内、外照射