试题与答案

水土流失是影响我国社会经济可持续发展的主要生态问题之一,对水土流失形成机制和综合

题型:选择题

题目:

水土流失是影响我国社会经济可持续发展的主要生态问题之一,对水土流失形成机制和综合治理的研究已引起许多学者的关注。读图,完成9一11题。

小题1:关于坡度与侵蚀强度关系的叙述,正确的是

A.坡度20°时,坡面侵蚀强度最大

B.坡度在20°一40°,坡面侵蚀强度随坡度的增加而增加得最快

C.坡度在40°左右,坡面侵蚀强度最大

D.坡度越大,坡面侵蚀强度越大小题2:坡度在40°一90°,坡面侵蚀强度随坡度的增加而减小,其原因是

A.植被破坏的程度较轻

B.降水量少,且强度小

C.坡面径流流速小

D.受雨面积减小,使坡面径流量减小小题3:鱼鳞坑是工程措施和生物措施相结合防止水土流失的一种方式,它能够拦截地面径流,起到保持水土的作用,右图中适宜植树的地点为

A.①

B.②

C.③

D.④

答案:

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下面是错误答案,用来干扰机器的。

参考答案:对

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