The nurse allowed the visitors to remain the ...

The nurse allowed the visitors to remain 　　 the visiting hours，though it was not permitted.

A．within　　　 B．at　　　 C．beyond　　　　 D．before

高三英语单项填空中等难度题查看答案及解析

Every animal sleeps, but the reason for this has remained foggy. When lab rats are not allowed to sleep, they die within a month.1.

One idea is that sleep helps us strengthen new memories. 2. We　 know that, while awake, fresh memories are recorded by reinforcing (加强) connections between brain cells, but the memory processes that take place while we sleep have been unclear.

Support is growing for a theory that sleep evolved so that connections between neurons (神经元) in the brain can be weakened overnight, making room for fresh memories to form the next day.3.

Now we have the most direct evidence yet that he is right.4. The synapses in the mice taken at the end of a period of sleep were 18 per cent smaller than those taken before sleep, showing that the connections between neurons weaken while sleeping.

If Tononi’s theory is right, it would explain why, when we miss a night’s, we find it harder the next day to concentrate and learn new information — our brains may have smaller room for new experiences.

Their research also suggests how we may build lasting memories over time even though the synapses become thinner. The team discovered that some synapses seem to be protected and stayed the same size.　 5. “You keep what matters,” Tononi says.

A. We should also try to sleep well the night before.

B. It’s as if the brain is preserving its most important memories.

C. That’s why students do better in tests if they get a chance to sleep after learning.

D. Similarly, when people go for a few days without sleeping, they get sick.

E. The processes take place to stop our brains becoming loaded with memories.

F. Tononi’s team measured the size of these connections, or synapses, in the brains of 12 mice.

G. “Sleep is the price we pay for learning,” says Giulio Tononi, who developed the idea.

高三英语七选五困难题查看答案及解析

While in London, we paid a visit to the hospital founded__________the nurse Florence Nightingale.

高三英语单项填空简单题查看答案及解析

We often visit the nursing home and talk to the aged as if they ______ our own grandparents.

A.were B.are C.had been D.will be

高三英语单项填空中等难度题查看答案及解析

How exciting it is to visit China! China can offer what 1. (appeal) to every visitor, but the crowds can be an issue.

Before getting on the plane, train, or bus, learn from these mistakes to avoid the crowds and make the 2. (much) of your holiday.

There are certain dates throughout the year when the entire country takes a vacation at the same time. If you travel in China during one of these “golden weeks”, you 3. expect never-ending lines, 4. (pack) public transportation, and seas of strangers appearing in the background of your photos. So it is important lo gel familiar with the dales 5. (minimize) your travel stress.

Of course, any trip to China wouldn’t be complete without seeing major cultural landmarks, 6. the Great Wall, or the Forbidden City. However, there are so many worthwhile places lo experience, 7. may not be listed in your tour book.

Also, with a family to travel together, 8. (wake) up early can be a challenge. Do your best to wake up early and take your breakfast to go; it’s worth it. Getting to an 9. (attract) early will allow you to experience it 10. (full) without the inconvenience of a large crowd.

高三英语短文填空困难题查看答案及解析

_____ more visitors，the Beijing Garden Expo Park gives roses to visiting couples．

A．Attracted

B．Attracting

C．To attract

D．Having attracted

高三英语单项填空中等难度题查看答案及解析

_____ more visitors，the Beijing Garden Expo Park gives roses to visiting couples．

A．Attracted    B．Attracting

C．To attract    D．Having attracted

高三英语单项填空中等难度题查看答案及解析

_____ more visitors， the Beijing Garden Expo Park gives roses to visiting couples．

A． Attracted 　　　　 B． Attracting

C． To attract 　　　 D． Having attracted

高三英语单项填空中等难度题查看答案及解析

______ more visitors, the Beijing Garden Expo Park gives roses to visiting couples.

A. Attracted                  B. Attracting     C. To attract              D. Having attracted

高三英语单项填空中等难度题查看答案及解析

______ more visitors, the Beijing Garden Expo Park gives roses to visiting couples.

A. Attracted       B. Attracting       C. To attract        D.  Having attracted

高三英语单项填空中等难度题查看答案及解析