-考呗网题库移动版

单选题

A．The animals overfertilize the soil.
B．Dead plant roots can't hold the soil together.
C．The wrong types of plants are left standing.
D．There is a buildup of plant and animal matter.

参考答案B

解析:How does overgrazing damage soil?
细节题。根据Too many animals eating in the same area will kill the vegetation. And because it's the roots of this vegetation that hold much of the soil together, when too much of the vegetation dies, the soil erodes.可知．过度放牧会严重破坏植被，而这些植被的根能够凝沙固土，一旦植被被破坏，土地就会退化。因此，正确答案是B。

点击查看答案进入在线模考

你可能喜欢

单选题

A．It can cause flooding
B．It can carry diseases that affect animals.
C．It can introduce too much salt into the soil.
D．It can divert water from important crops.

点击查看答案进入在线模考

单选题

A．Teach their young how to swim.
B．Mate and lay eggs.
C．Hide from predators.
D．Eat different kinds of fish.

点击查看答案进入在线模考

单选题

A．Its geography is similar to Brazil's.
B．Their instinct leads them to the place they were hatched.
C．There are other species of turtles located there.
D．Its climate is milder than Brazil' s.

点击查看答案进入在线模考

hot热门搜索

你可能喜欢

延伸阅读