问题 解答题

一辆汽车从甲地到乙地,每小时行45千米,4.8小时到达.如果每小时多行5千米,几小时到达?

答案

(45×4.8)÷(45+5)

=216÷50

=4.32(小时)

答:4.32小时到达.

选择题
阅读理解

阅读理解。

     In meditation (冥想),people sit quietly and focus their attention on their breath. As they breathe in and

out, they attend to their feelings. As thoughts go through their minds. they let them go. Breathe. Let go.

Breathe. Let go.

     According to a recent study at the Insight Meditation Society in Barre, Massachusetts, three months of

training in this kind of meditation causes a market change in how the brain allocates (分配) attention. It

appears that the ability to let go thoughts that come into mind frees the brain to attend to more rapidly

changing things and events in the outside world. Expert mediators are better than other people at catching

such fast-changing stimuli (刺激), like facial expressions.

     The study provides evidence for changes in the workings of the brain with mental training. People can

learn and improve abilities of all sorts with practice. everything from driving to playing the piano. The study

has shown that meditation is good for the brain, It appears to reduce pressure and promote a sense of

well-being.

     In an experiment, 17 volunteers with no meditation experience in the experimental group spent three

months meditating 10 to 12 hours a day. A control group also with no meditation experience meditated for

20 minutes a day over the same period. Both groups were then given the tests with two numbers in a group

of letters. As both group looked for the numbers, their brain activity was recorded. 

     Everyone could catch the first number. But the brain recordings showed that the less experienced

mediators tended to grasp the first number and hang onto it, so they missed the second number. Those with

more experience gave less attention to the first number. as if letting it go, which led to an increased ability

to grasp the second number, This shows that attention can change with practice.

     Just ask Daniel Levision, who meditated for three months as part of the study. " I am a much better

listener," he said. "I do not get lost in my own personal reaction to what people are saying."

1. The underlined word "them" in Paragraph 1 refers to ______.

A. feelings

B. minds

C. people

D. thoughts

2. Meditations manage their daily tasks better because they ______.

A. are given less pressure

B. allocate their attention better

C. have more stimuli for life

D. practice them more frequently

3. In the experiment, volunteers doing meditation for longer hours ______.

A. were more likely to catch both of the members

B. were used to memorizing numbers in groups

C. usually ignored the first number observed

D. paid more attention to numbers than to letters

4. The study proves that ______.

A. meditation improves one's health

B. brain activity can be recorded

C. human attention can be trained

D. mediators have a good sense of hearing