估计呈正态分布的应变量与一个自变量之间的数量关系，可用简单线性回归分析。()
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Which of the following sentences expresses INTENTION？
A. I won"t go back on my words.
B. We won"t stay longer than two hours.
C. You shall obey my orders.
D. I say you shall do it.
Congress has decreed that the present law_____.
A. be maintained
B. were maintained
C. were to be maintained
D. should maintain
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