______指先于一定的活动而又指向该活动的一种动力准备状态。

小孔成像中所成的像是（　　）

A．倒立的虚像

B．倒立的实像

C．正立的实像

D．正立的虚像

下列《湘夫人》的诗句中，运用了因情造景表现方式的是(　)

A．嫋嫋兮秋风，洞庭波兮木叶下

B．鸟何萃兮蘋中，罾何为兮木上

C．沅有茝兮醴有兰，思公子兮未敢言

D．捐余袂兮江中，遗余褋兮醴浦

Homework can put you in a bad mood (心情), and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children.

The first experiment tested 30 kids. Some shapes (图片) were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes.

In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others.

The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted (使分心) kids from finding shapes.

While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay.

小题1:Researchers did experiments on kids in order to find out ______.

A．how they really feel when they are learning

B．whether mood affects their learning ability

C．what methods are easy for kids to learn

D．the relationship between sadness and happiness小题2:The researchers found in the first experiment that ______.

A．kids who listened to happy music turned out to be energetic

B．kids who listened to sad music liked to choose smiley faces

C．kids worked harder in the background of happy music

D．sad music helped kids find out small shapes quickly小题3:What can we learn from the text?

A．The researchers will continue to do experiments.

B．The researchers have found a clear answer.

C．The experiments are popular among kids.

D．Kids change their feelings more easily.小题4:We can infer that the text is ______.   

A．a science survey

B．a research report

C．a school project

D．an introduction to an experiment

积极履行公务。秉公执法，文明执勤是人民警察必须遵守的工作纪律。( )

简述鱼苗肥水下塘的基本原理。