简述时间序列的数据类型。
参考答案:
时间序列数据随时间推移而变动主要包括趋向变动/趋势变动、周期变动、季节变。
The reason ________ he was late for the meeting was _______ his car had broken down on the road.
A.why; because
B.why; that
C.that; that
D.for which; because
出自龚延贤的话是()。
A."人命至重,有贵千金,一方济之,德逾于此"
B."无恒德者,不可以做医,人命生死之所系"
C."一存仁心,……二通儒道,……三精脉理,……四识病原,……十勿重利。"
D."不为良相,愿为良医"
E."夫医者,非仁爱之士,不可托也;非聪明理达,不可任也;非廉洁淳厚,不可信也。"