问题 问答题 简答题

工矿区水土流失与可持续发展的影响是什么?

答案

参考答案:

工矿区生产建设活动能够带来经济的发展,为当代人民生活需求的提高提供了保障。而工矿区生产建设活动所带来的负效应是很严重的,包括对地表的扰动,使得地表水损失;对土壤的深层

扰动使地下水损失、水质也可能受到污染;废弃物堆积导致耕地减少,地面破坏或沉陷;人工边坡的形成,使表层土壤侵蚀混合岩土搬运流失;穿山凿洞导致植被破坏,土地生产力下降,崩塌滑坡加剧,泥石流等危害发生;有毒物质的排放使水库湖泊淤积,公路铁路破坏,农田村庄压埋,人民生命财产损失。这一系列效应都使得当代和后代受害,是不可持续发展的。只有采取有效的水土保持措施遏制以上负效应,才能满足当代、后代人的需求,才能可持续发展。

选择题
阅读理解

It was the first day of second grade, and Sarah had been looking forward to this moment. The night before, she laid out her favorite clothes: a white coat and a bright yellow shirt.

When having breakfast, Sarah dropped some food on her shirt, so she had to change into her second-best clothes, blue jeans and a Jonas Brothers T-shirt.

After breakfast Sarah rushed to catch the school bus and when she was just reaching the door the bus driver opened it. The door hit right in Sarah’s face and blood dripped from her nose. The driver wanted to send her home, but she refused, "It is the most important day of the year! I can’t miss it!"

Before classes, Sarah went to her favorite swing. When rising high, she saw her best friend little Jack. She let go of the swing and waved to him with one hand. Unfortunately, she flew out of the swing and landed hard on the sand, breaking a leg and an arm. As she lay in the sand, she noticed a shiny thing on the ground beside her. With her good hand she took it.

When Sarah’ mother rushed into the ward she was surprised by what she saw: her girl was lying in bed with an arm and a leg in the splint (夹板), a broken nose, and blood stains on her second-best clothes. Expecting to see her child crying, she was confused when she saw a big, bright smile on Sarah’s face.

"Sarah, look at you!" her mother cried. "You were hurt so badly and why are you smiling?"

"Look, Mommy, I found a diamond!" Sarah laughed.

Life can be like that. It can be tough, even painful sometimes. But there are always treasures that make the pain worth suffering.

小题1:When Sarah went to school, she was wearing ________________.

A.a white coat and a Jonas Brothers T-shirt

B.blue jeans and a yellow shirt

C.a white coat and a yellow shirt

D.blue jeans and a Jonas Brothers T-shirt小题2:Sarah fell off the swing because _____________.

A.she seldom played swing

B.she rose too high

C.she waved one hand to her friend

D.she was pulled down by her friend小题3: When Sarah’s mother saw her in the ward she felt _______________.

A.upset

B.puzzled

C.relaxed

D.disappointed小题4:Which of the following can be used to describe Sarah’s story?

A.Every cloud has a silver lining.

B.Nothing is impossible to a willing mind.

C.First think, then act.

D.No pains, no gains.