鱼类的咽喉齿是用来（）食物的。

《地表水环境质量标准》(GB 3838—2002)中，对化学需氧量的监测分析方法是( )。

A．碘量法

B．重铬酸盐法

C．电化学探头法

D．稀释与接种法

2011年我国就业形势依然严峻，就业任务十分艰巨，就业总量压力依然很大，劳动力供大于求的基本格局并未改变。这要求我国各级政府

①促进经济发展同扩大就业良性互动   ②促进就业观念转变，灵活地选择就业

③改善就业结构并直接提供就业岗位   ④把扩大就业作为经济发展的重要指标

A．①③

B．②④

C．①④

D．②③

平衡记分卡的基本思路就是，将影响企业运营的各种因素划分为（）.

A、财务

B、客户

C、学习与成长

D、内部业务流程

E、以上都是

If you are like most people, your intelligence varies from season to season. You are probably a lot sharper in the spring than you are at any other time of the year. A noted scientist, Ellsworth Huntington (1876-1947), concluded from other men’s work and his own among peoples in different climates that climate and temperature have a definite effect on our mental abilities.
He found that cool weather is much more favorable for creative thinking than is summer heat. This does not mean that all people are less intelligent in the summer than they are during the rest of the year. It does mean, however, that the mental abilities of large numbers of people tend to be lowest in the summer.
Spring appears to be the best period of the year for thinking. One reason may be that in the spring man’s mental abilities are affected by the same factors that bring about great changes in all nature.
Fall is the next-best season, then winter. As for summer, it seems to be a good time to take a long vacation from thinking!

One possible reason why spring is the best season for thinking is that ______.

A．all nature, including man, is growing then

B．it lasts longer than the other seasons

C．it is not too warm and not too cold

D．both B and C

高供高计专变终端处理时限为（）小时。

A.4

B.24

C.12

D.48