为了对上述资料进行长期趋势分析,可以采用的方法有()。
A. 时距扩大法
B. 移动平均法
C. 剩余法
D. 数学模型法
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A.countlessB.titanicC.broadD.vast
A. countless
B. titanic
C. broad
D. vast
Trees ______ themselves by seeds.
A. cultivate
B. grow
C. enrich
D. propagate
A.whichB.thatC.whatD.when
A. which
B. that
C. what
D. when
A.intensiveB.absorbedC.intenseD.concentrated
A. intensive
B. absorbed
C. intense
D. concentrated