题目内容
同一图形，在特殊情况下，可以用两种比例，但必须详细注明尺寸。( )
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图纸上指北针的箭头指的是北面，而箭尾为南向。 ( )
现今世界上的各个国家和地区，有的国家不设警察。 ( )
When man began to search the skies, he saw a lot of things. In the universe(宇宙), the earth seemed to be just a small bit of dust. It is only a small planet, and travels around the sun. The sun together with its planets, travels in the Milky Way(银河), our galaxy(星系). The Milky Way has about thirty billion stars like our sun, and is one of about a hundred million galaxies in the universe.Because the space (空间)is so great, it is difficult to work out how far away a star is. Instead of kilometres, we have light-years. A light-year means how far light travels in one year. Our nearest neighbour galaxy is more than 9000,000 light-years away from the earth. Man has known that ().
在新世纪、新阶段，公安机关的总任务是维护国家稳定和社会和谐。( )
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