A.They tolerate distractions.B.They often find themselves in hot water.C.They are gene
A.They tolerate distractions.
B.They often find themselves in hot water.
C.They are generally lazy.
D.They are critical to family life.
A.They tolerate distractions.
B.They often find themselves in hot water.
C.They are generally lazy.
D.They are critical to family life.
A big problem facing people today is that
A.they must tolerate phone disturbances or miss important calls.
B.they must turn off their phones to keep their homes quiet.
C.they have to switch from a desktop phone to a cellphone.
D.they are too busy to make phone calls.
A.ECharts不区分完全版、常用版、精简版
B.echarts/dist/echarts.common.js是常用版,体积适中,包含常见的图表和组件
C.echarts/dist/echarts.simple.js是精简版,体积较小,仅包含最常用的图表和组件
D.echarts/dist/echarts.js是完全版,体积最大,包含所有的图表和组件
A、Dist/位移
B、Vel/速度
C、Accel/加速度
D、Jerk/加加速度
假设你想如同例6.3那样估计出勤率对学生成绩的影响。一个基本模型是:
其中变量定义与第6章相同。
(i) 令dist为学生住宿区到教学大楼的距离。你认为dist与u不相关吗?
(ii) 假定dist与u不相关, 要成为a in dr le的一个有效IV, dist还必须另外满足什么假定?
(iii) 假定我们如在方程(6.18) 中一样增添交互项pri GPA-at nd rte:
若ct nd rte与u相关, 则一般认为pri GPA也与u相关。priG PAra tnd rte的一个好I将是什么呢?[提示:若E(ul pri GPA, ACT, dst) =0(在pri GPA、ACT、dst均外生时出现) , 则pri GPA和dit的任何函数都与u不相关。]
Tax incidence is the______.
A.behaviour of shifting the tax to another party
B.ultimate distribution of a tax's burden
C.structure of the tax
D.measure of the impact the tax has on employment and output
A.She distrusts Mrs. Sands of her professional ability
B.She dislikes Mrs. Sands for being too nosy
C.She is afraid that Mrs. Sands will take the letter away from her
D.She is unwilling to have her illusion cleared away by Mrs. Sands
What can be inferred from the passage?
A.There is no obvious reason for the unbalanced distribution of dyslexia in the world
B.The existing theories about dyslexia are solid and conclusive.
C.There are underlying reasons for the differences with dyslexic problems with different peoples.
D.The relatively lower number of its people suffering from dyslexia in Japan may be attributed to its reading and writing system.