(原创)皑皑冰原,蕴藏着无数的自然奥秘。对南极地区的科学考察,是一项很有科技含量,也很有意思的事情,吸引着来自世界各地的科技工作者。2014年2月8日,五星红旗又一次在白茫茫的南极大陆飘扬,分外显眼。站如其名,南极泰山站(如图所示)在中国极地科考史上树起了一座新的高峰。而南极气温最低可达-89.2 ℃,则当地应选用的温度计是:( )
物质
固态煤油
固态酒精
固态水银
熔点/℃
-30
-117
-39
A:水银温度计
B:酒精温度计
C:煤油温度计
D:三种温度计都行
Gypsies
According to the linguistic and genetic researches, ancestors of the Gypsies left the land of India in the amount that did not go beyond 1,000 people. Today there are about 10 million Gypsies in the world. Some scientists believe that Gypsies were Egyptians.
Sumerians
Sumerians must be the mysterious people in the ancient world. We know nothing about their origin and nothing about the origin of their language. The Sumerians were rather advanced—they became the first in the Near East to use a wheel, to create an irrigation system and their unique writing. And besides, they were impressively good at maths and astronomy.
Maya
Some scientists believe that they are connected to legendary atlantes (男像柱), others suppose their ancestors were Egyptians. It's thought that the Maya created an efficient agricultural system and had deep astronomy knowledge. Their calendar was used by other people of Central America. Maya applied the hieroglyphic writing (象形文字) system. Now it seems that the Maya came from nowhere and disappeared nowhere.
下列估测中,最接近实际的是()