糖尿病早期肾损害的敏感指标是（） A.尿微量清蛋白 B.β微球蛋白 C.本-周蛋白

在现收现付制下，养老保险的人均缴费或征税率决定于（ ）等因素。①制度提供的养老金替代率②制度内人口抚养比③人均寿命④通货膨胀率

A．①②

B．①③

C．①②③

D．①②④

Passage Two

In the 1920s, the pioneers of artificial intelligence (AI) predicted that, by the end of this century, computers would be conversing with us at work and robots would be performing our housework. But as useful as computers are, they are nowhere close to achieving anything remotely resembling these early aspirations for humanlike behavior. Never mind something as complex as conversation: the most powerful computers struggle to reliably recognize the shape of an object, the most elementary of tasks for a ten-month-old kid.

A growing group of AI researchers think they know where the field went wrong. The problem, the scientists say, is that AI has been trying to separate the highest, most abstract levels of thought, like language and mathematics, and to duplicate them with logical, step-by-step programs. A new movement in AI, on the other hand, takes a closer look at the more roundabout way in which nature came up with intelligence. Many of these researchers study evolution and natural adaptation instead of formal logic and conventional programs. Rather than digital computers and transistors, some want to work with brain cells and proteins. The results of these early efforts are as promising as they are peculiar, and the new nature-based AL movement is slowly but surely moving to the forefront of the field.

Imitating the brain’s neural network is a huge step in the right direction, says computer scientist and biophysicist Michael Conrad, but it still missed an important aspect of natural intelligence. "People tend to treat brain as if it were made up of color-coded transistors. " He explains, "But it’s not simply a clever network of switches. There are lots of important things going on inside the brain cells themselves." Specifically, Conrad believes that many of the brains’ capabilities stem from the pattern-recognition proficiency of the individual molecules that make up each brain cell. The best way to build an artificially intelligent device, he claims, would be to build around the same sort of molecular skills.

Right now, the notion that conventional computers and software are fundamentally incapable of matching the processes that take place in the brain remains controversial. But if it proves true, then the efforts of Conrad and his fellow AI rebels could turn out to be the only game in town.

What’s the author’s opinion about the new AI movement ？（）

A．It has created a sensation among artificial intelligence researchers but will soon die out.

B．It’s a breakthrough in duplicating human thought processes.

C．It’s more like a peculiar game rather than a real scientific effort.

D．It may prove to be in the right direction though nobody is sure of its future prospects.

如图所示，AB为一段光滑绝缘水平轨道，BCD为一段光滑的圆弧轨道，半径为R，今有一质量为m、带电为+q的绝缘小球，以速度v₀从A点向B点运动，后又沿弧BC做圆周运动，到C点后由于v₀较小，故难运动到最高点．如果当其运动至C点时，忽然在轨道区域加一匀强电场和匀强磁场，使其能运动到最高点此时轨道弹力为0，且贴着轨道做匀速圆周运动。求：

（1）匀强电场的方向和强度；

（2）磁场的方向和磁感应强度。

为什么说高压输电可降低输电线上的电能损失和电压损失？

电信公司根据话务量的忙闲和数据电路的拥塞情况来推出不同时段的话费价格，此营销方式就是对话费进行（）。

A.心理细分

B.行为细分

C.人口细分

D.地理细分