问题 解答题

下表是青春期各项发育指标出现的顺序.阅读下表,回答有关问题.

年龄(岁)女孩男孩
8~9身高突增开始
10~11 * * 发育开始,身高突增高峰,出现阴毛身高突增开始,睾丸、阴茎开始增长
12 * * 继续增大身高突增高峰,出现喉结
13月经初潮出现,出现腋毛出现阴毛,睾丸、阴茎继续增大
14 * * 显著增大变声,出现腋毛
15脂肪积累增多,丰满,臀部变圆一般首次遗精,出现胡须
16月经规则阴茎、睾丸已达成人大小
17~18骨骺愈合,停止生长体毛接近成人水平
19以后骨骺愈合,停止生长
(1)请对照上表,根据自己的发育情况,看自己的发育是否正常.如果不正常,试找出原因.

(2)针对现在部分同学青春期发育提前的现象,试通过查找资料,请教家长、老师或医生,分析其中原因.

答案

(1)结合上表中的内容、分析发现,自身发育基本正常.

(2)分析发现,部分同学有青春期发育提前的现象,究其原因,主要有:1、生活水平提高,饮食中营养过剩,孩子的生长发育加速,性发育及性成熟有提前的趋势.2、摄取含有性激素的滋补品或误服避孕药.3、食品中含激素类的添加剂太多,促进了身体的发育,使青春期提前.4、环境污染.农药及塑料业制造厂等排放的有害物质及其分解物质,产生了一 系列的环境类激素污染物,这些污染物导致早熟等.

故答案为:(1)正常

(2)1、饮食中营养过剩.2、摄取含有性激素的滋补品或误服避孕药.3、食品中含激素类的添加剂太多.4、环境污染.

填空题

[A] Dr Daniel Stanley, an oceanographer, has found volcanic shards in Egypt that he believes are linked to the explosion. Computer simulations by Mike Rampino, a climate modeler from New York University, show that the resulting ash cloud could have plunged the area into darkness, as well as generating lightning and hail, two of the 10 plagues.

[B] The cloud could have also reduced the rainfall, causing a drought. If the Nile had then been poisoned by the effects of the eruption, pollution could have turned it red, as happened in a recent environmental disaster in America. The same pollution, could have driven millions of frogs on to the land, the second plague. On land the frogs would die, removing the only obstacle to an explosion of flies and lice-the third and fourth plagues. The flies could have transmitted fatal diseases to cattle (the fifth plague) and boils and blisters to humans (the sixth plague).

[C] Moses, which will be broadcast in December 2002, will suggest that much of the Bible story can be explained by a single natural disaster, a huge volcanic eruption on the Greek island of Santorini in the 16th century BC.

[D] The hour-long documentary argues that even the story of the parting of the Red Sea, which allowed Moses to lead the Hebrews to safety while the pursuing Egyptian army was drowned, may have its origins in the eruption. It repeats the theory that "Red Sea" is a mistranslation of the Sea of Reeds, a much shallower swamp.

[E] The programme tells the story of how Moses led the Hebrews out of Egypt after a series of plagues had devastated the country. But it also uses new scientific research to argue that many of the events surrounding the exodus could have been triggered by the eruption, which would have been a thousand times more powerful than a nuclear bomb.

[F] Computer simulations show that the Santorini eruption could have triggered a 600ft-high tidal wave, traveling at about 400 miles an hour, which would have been 6ft high and a hundred miles long when it reached the Egyptian delta. Such an event would have been remembered for generations, and may have provided the inspiration for the story.

[G] Fresh evidence that the Biblical plagues and the parting of the Red Sea were natural events rather than myths or miracles is to be presented in a new BBC documentary.

Order:

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