液压系统产生噪声不可能是（）造成的。A、空气侵入 B、液压油污染 C、油面低 D、密封装置

金属陶瓷( )

据有关资料显示，我国农村剩余劳动力人口不断增加，且形成了一股向东南沿海和大中城市流动的“民工潮”。20世纪80年代初期，我国异地流动的外出打工者不过几百万人，到20世纪80年代末期，达2500万人，到20世纪90年代以后，全国流动人口急剧增加到8000万人。其中常年流动的农民工6000万人，跨区域流动的农民工4000万人。
根据以上材料回答下列问题：

农村劳动力过剩一般表现为( )。

A．失业

B．不完全失业

C．充分就业

D．隐蔽性失业

甲乙双方签订了一份房屋租赁合同，租期为半年。在房屋租赁期内，乙公司将该房屋转租给丙公司。甲公司得知后，表示异议。下列表述正确是()。

A.乙公司可以在租期内将该楼转租丙公司，但不得改变原租赁用途

B.乙公司可以在租期内将该楼转租给丙公司

C.甲公司有权解除租赁合同

D.乙公司有权解除租赁合同

近年来,全国人大及其常委会就社会各界所关注的问题开展了多次专题询问；同时，对食品安全、老年 * * 益等问题，也加大了执法检查的力度。专题询问和执法检查体现了人大的

A．执法权

B．决定权

C．监督权

D．质询权

You really do have to wonder whether a few years from now we’ll look back at the first decade of the 21st century—when food prices spiked, energy prices soared, world population surged, tornados plowed through cities, floods and droughts set records, populations were displaced and governments were threatened by the confluence of it all—and ask ourselves. What were we thinking How did we not panic when the evidence was so obvious that we’d crossed some growth, climate, natural resource and population redlines all at once "The only answer can be denial," argues Paul Gilding, an Australian environmentalist, in a new book called The Great Disruption. "When you are surrounded by something so big that requires you to change everything about the way you think and see the world, then denial is the natural response. But the longer we wait, the bigger the response required."

Gilding cites the work of the Global Footprint Network, an alliance of scientists, which calculates how many "planet Earths" we need to sustain our current growth rates. G. F. N. measures how much land and water area we need to produce the resources we consume and absorb our waste, using prevailing technology. On the whole, says G. F. N. , we are currently growing at a rate that is using up the Earth’s resources far faster than they can be sustainably replenished, so we are eating into the future.

This is not science fiction. This is what happens when our system of growth and the system of nature hit the wall at once. We are now using so many resources and putting out so much waste into the Earth that we have reached some kind of limit, given current technologies. The economy is going to have to get smaller in terms of physical impact.

We will not change systems, though, without a crisis. But don’t worry, we’re getting there. We’re currently caught in two loops: One is that more population growth and more global warming together are pushing up food prices, causing political instability in the Middle East, which leads to higher oil prices, thus to higher food prices and more instability. At the same time, improved productivity means fewer people are needed in every factory to produce more stuff. So if we want to have more jobs, we need more factories. More factories making more stuff make more global warming, and that is where the two loops meet.

But Gilding is actually an eco-optimist. As the impact o the imminent Great Disruption hits us, he says, "our response will be proportionally dramatic, mobilizing as we do in war. We will change at a scale and speed we can barely imagine today, completely transforming our economy, including our energy and transport industries, in just a few short decades. " We will realize, he predicts, that the consumer-driven growth model is broken and we have to move to a more happiness-driven growth model, based on people working less and owning less.

The author agrees with Gilding that（）

A. both growth and tapping of nature have reached their limits

B. one way of breaking the loops is making better use of the technology

C. the current situation is not as bad as the G. F. N. scientists state it

D. improved productivity will eventually help raise the employment rate