正确答案是：9 - 查题网

>> 国家开放大学 / 数理统计

国家开放大学 / 数理统计

正确答案是：9

积分

数理统计

参考答案：

点击查看答案

佳题速递：

细胞分化发生于细胞分裂的( )。细胞生物学

根据埃里克森的心理社会发展理论，学前儿童的主要发展任务是获得自信。学前教育心理学

“四个全面”战略布局是一个整体。其中,( )是动力源泉,是实现中国梦的关键一招。毛中特C

【单项选择题】关于组织文化三个层面之间关系的描述错误的是( )。 a.物质层是精神层和制度层的中介 b.物质层、制度层是精神层的外在体现c.精神层决定物质层和制度层 d.三个层面相互影响、相互作用现代企业管理方法

以下称为肌性动脉的是：( ) 组织学与胚胎学

14、The sun is the closest star to earth. It takes 8 minutes for the light from the sun to reach our earth. The distance from the sun to earth is one astronomical unit（天文单位）. It is about 150 million kilometers. Energy from the sun heats the earth's surface. The earth would be too cold for life without our star's heat energy. Other stars are too far away to give the earth enough heat energy for life. Scientists wonder if there is life near other stars. Our sun is an average（平均的） size star. It appears like the largest one, because it is the closest star. Some stars are smaller than our sun. Very small stars are called dwarf（短小的）stars. Some of them are no larger than our small planets. Some stars are much larger than our sun. The largest stars are called giant（巨大的）stars. Not all stars are the same distance from the earth. The different distances make some giant stars appear very small. Astronomers （天文学家）use light-year to talk about distance in space. A light-year is the distance the light travels in one year. The star, Alpha Centauri is the closest star besides our sun. It is over 4 light-year away from earth. It takes light from this star over four years to reach the earth.统考英语阅读理解