“文件应符合标准的要求和组织的实际情况”体现了职业健康安全与环境管理体系文件的(

小莉同学将远视眼镜镜片放在了光源与光屏之间，移动透镜和光屏（相当于视网膜），直到在光屏上得到了一个倒立缩小的清晰的像．将远视眼镜镜片取下，发现“视网膜”上的像变模糊了．请回答：此时像落在“视网膜”的______面（填“前”或“后”），为了使屏上的像重新变得清晰，在不移动光源和凸透镜位置的前提下，应将光屏向______（靠近/远离）透镜的方向移动．结果表明：远视眼镜作用是使像相对于晶状体向______（前/后）移，从而使清晰的像落在视网膜上，可见矫正远视眼所配戴眼镜的镜片是______（凸/凹）透镜．

Fish species are expected to shrink in size by up to 24% because of global warming, say scientists.

The scientists argue that failure to control greenhouse gas emissions will have a greater effect on marine ecosystems than previously thought. Previous research has suggested that changing ocean temperatures would affect both the distribution and the reproductive abilities of many species of fish. This new work suggests that fish size would also be heavily affected.

The researchers built a model to see how fish would react to lower levels of oxygen in the water. As ocean temperatures increase, so do the body temperatures of fish. But, according to lead author, Dr William Cheung, from the University of British Columbia, the lower level of oxygen in the water is key. Warmer waters could decrease ocean oxygen levels and greatly reduce fish body weight. On the other hand, rising temperatures directly increase the metabolic rate of the fish's body function. This leads to an increase in oxygen demand for normal body activities. So the fish will run out of oxygen for growth at a smaller body size.

The research team also used its model to predict fish movements as a result of warming waters. The group believes that most fish populations will move towards the Earth's poles at a rate of up to 35km per decade. "So in, say, the North Sea," says Dr Cheung," one would expect to see more smaller-body fish from tropical waters in the future."

Taking these factors into consideration, the research team concludes that fish body size will shrink between 14% and 24%, with the largest decreases in the Indian and Atlantic oceans.

When compared with actual observations of fish sizes, the model seems to underestimate what's actually happening in the seas. The researchers looked at two case studies involving North Atlantic cod and haddock. They found that recorded data on these fish showed greater decreases in body size than the models had predicted.

Dr Alan Baudron, from the University of Aberdeen, UK, believes smaller-sized fish could seriously affect the ability of fish to reproduce. "Smaller fish produce fewer and smaller eggs which could affect the reproductive potential of fish stocks," he said.

小题1:What's the main idea of the passage?

A．Global warming makes fish smaller.

B．Global warming makes fish decrease in numbers.

C．Global warming affects the fish distribution.

D．Global warming affects the ability of fish to reproduce.小题2:What is the key factor making the fish smaller now?

A．The rising body temperatures.

B．The lower level of oxygen in the water.

C．The increasing metabolic rate.

D．The normal body activities.小题3:We can infer that as ocean temperatures increase          .

A．more big fish will be born in the sea

B．fish tend to swim towards the shore

C．fish tend to move towards the warm areas

D．fish tend to move towards the colder areas小题4:What does the underlined word "underestimate" mean?

A．make an exact prediction of

B．make too low an estimate of

C．make too high an estimate of

D．make a careful study of

在符号学视野中，将符号与现实世界的事物联系起来进行思考之际的意义属于（）。

A、外延意义

B、内涵意义

C、区别性意义

D、指示性意义

周围血管征不包括

A．奇脉
B．水冲脉
C．点头运动
D．毛细血管搏动征
E．明显颈动脉搏动

试述国外大众体育兴起的原因。