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【简答题】
用描述法表示下列集合 : (1) 小于 7的实数构成的集合 ; (2) 不等式4x>3 的 ; (3) 所有正方形组成的集合 ; (4) 一次函数y=4x-1 图像上的点组成的集合 .
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反馈参考答案：
举一反三
【简答题】替代效应(substitution effection)
【单选题】The following can be said about the income and substitution effects of a price increase on the demand for the good whose price rose:
A.
The former is always positive and the latter is always negative.
B.
Both can be either positive or negative.
C.
While the latter is always negative, the former can be either positive or negative.
D.
While the former is always negative, the latter can be either positive or negative.
【简答题】进口替代(import substitution)
【简答题】基因置换(gene substitution)
【单选题】Which one of the following is not the kind of substitution?
A.
nominal substitution
B.
verbal substitution
C.
clausal substitution
D.
sentence substitution
【简答题】替代互换(substitution swap)
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