The word "surge" in line 18 is closest in meaning to()
A. sharp increase
B. sudden stop
C. important change
D. excess amount
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Almost()substances expand in volume when heated and contract when cooled.
A. all
B. they all
C. all of
D. all are
The word "obscure" in line 1 is closest in meaning to()
A. interesting
B. unclear
C. imperfect
D. complex
The word "laborious" in line 8 is closest in meaning to()
A. unfamiliar
B. primitive
C. skilled
D. difficult
下列各项中,()适用于市场预测呈水平波动,无明显上升或下降趋势情况下的预测。
A. 高次指数平滑法
B. 趋势外推法
C. 一次指数平滑法
D. 弹性系数法