水土保持是指对（）造成水土流失所采取的预防和治理措施。 A.自_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

水土保持是指对（）造成水土流失所采取的预防和治理措施。

A.自然因素

B.人为活动

C.自然因素和人为因素

D.自然因素和人为活动

答案

参考答案：D

选择题

Nine in ten parents said there were significant differences in their approach to educating their children
compared with _____ of their parents.

A. those
B. one
C. both
D. that

填空题

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