活动课上,小向同学们展示了两张泰州市1987年发行的购粮券和柴油供应票(见下图)。并配上了说明文字,其中表述错误的是( )
A:发行这种票证是由于经济发展水平较低,商品供应匮乏
B:这中当时人们购粮、买柴油所需的票证
C:这两张票证是在我国改革开放以前发行的
D:票证退出历史舞台表明我国由计划经济向市场经济体制转变
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.
逻辑推理是化学学习常用的思维方法。下列推理正确的是()
我国民族分布具有“大散居、小聚居”、 ____ 的特点.
新时期的山东精神植根于中华民族传统文化土壤,孕育在山东这个改革开放的前沿阵地,体现了鲜明的时代特色,是新时期山东人民开创新事业的重要精神动力。这表明( )
①民族精神的力量,集中体现为中华文化的力量
②推动文化发展的基础在继承,关键在创新
③文化越来越成为综合国力的决定因素
④中华民族精神在社会实践中得到丰富和发展