所有的二位正偶数之和是(). A: 2476 B: 2430 C: 2396 D: 2376
所有的二位正偶数之和是(). A: 2476 B: 2430 C: 2396 D: 2376
Directions: Each sentence has a word or phrase underlined. There are four words or phrase beneath each sentence. Choose the one word or phrase which would best keep the meaning of the original sentence if it were substituted for the underlined part. (每题10分,共10题) 1. In December 2017, the UN Security Council unanimously adopted Resolution 2396, which, among other things, obliges all UN Member States to develop the capability to collect, process, and analyze PNR to limit terrorist travel. (VOA)
Directions: Each sentence has a word or phrase underlined. There are four words or phrase beneath each sentence. Choose the one word or phrase which would best keep the meaning of the original sentence if it were substituted for the underlined part. (每题10分,共10题) 1. In December 2017, the UN Security Council unanimously adopted Resolution 2396, which, among other things, obliges all UN Member States to develop the capability to collect, process, and analyze PNR to limit terrorist travel. (VOA)
我国7个地区某季度人均生产总值(GDP)和人均消费水平统计数据: 地区序号 人均GDP(元) 人均消费水平(元) 地区1 地区2 地区3 地区4 地区5 地区6 地区7 22460 11226 34547 4851 5444 2662 4549 7326 4490 11546 2396 2208 1608 2035 (1)人均GDP作自变量,人均消费水平作因变量,绘制散点图,并说明二者之间的关系形态。 (2)计算两个变量之间的线性关系,说明两个变量之间的关系强度。 (3)拟合直线回归方程,并解释回归系数的实际意义。 (4)计算判定系数,并解释其意义。 (5)检验回归方程线性关系的显著性。(a=0.05) (6)如果某地区人均GDP为15 000元,预期其人均消费水平。
我国7个地区某季度人均生产总值(GDP)和人均消费水平统计数据: 地区序号 人均GDP(元) 人均消费水平(元) 地区1 地区2 地区3 地区4 地区5 地区6 地区7 22460 11226 34547 4851 5444 2662 4549 7326 4490 11546 2396 2208 1608 2035 (1)人均GDP作自变量,人均消费水平作因变量,绘制散点图,并说明二者之间的关系形态。 (2)计算两个变量之间的线性关系,说明两个变量之间的关系强度。 (3)拟合直线回归方程,并解释回归系数的实际意义。 (4)计算判定系数,并解释其意义。 (5)检验回归方程线性关系的显著性。(a=0.05) (6)如果某地区人均GDP为15 000元,预期其人均消费水平。