湖南师范大学附中2016届第三次月考英语试题及答案(4)

U.S. lawmakers who support the proposed measure say paid leave is good for the families and for businesses. Representative Don Beyer says paid leave is an encouragement to parents to return to the job. Mr. Beyer says training a new employee can cost a company a year's worth of income. But U.S. lawmakers who oppose the bill say they do not want to restrict businesses by requiring them to provide paid leave. They are offering a different measure. The Working Families Flexibility Act would allow employees to work extra hours and earn either time off or more pay.
28. If a woman in the U.S left to care for her newborn baby, she _________.
A. wouldn’t get extra time off
B. would get lower pay
C. would pay for her leave or she will be fired
D. wouldn’t get paid leave
29. Tricia Baldwin opposes paid leave because it will ________.
A. kill the national economic growth
B. not be enough to relieve the workers’ burden
C. add more costs to doing business
D. ruin companies rules
30. Some of the lawmakers are opposed to the proposed measure to require paid leave because they think ______.
A. it encourages parents to return to the jobs
B. it will add companies’ cost of training new employees
C. it gives workers more economic guarantees
D. it reduces employees’ working time
31. What is the best title for the passage?
A. How to reform the Rules of Paid Leave in the U.S.
B. Will the U.S Pay Workers for Family Leave?
C.Is it Good for the U.S to Pay Workers for Family Leave?
D. Why Doesn’t the U.S Pay Workers for Family Leave?
D
    One in five people carry a ‘smart gene’ variant(变体)linked to long lifespan, bigger forebrains and enhanced mental ability, researchers have found.
'We've known for a long time that people lose cognitive(认知) abilities as they age, but now we're beginning to understand that factors like KLOTHO can give people a boost in aging. Genetic variation in KLOTHO could help us predict brain health and find ways to protect people from the diseases that happen to us as we grow old, like Alzheimer’s disease(老年痴呆症),” said senior author, Dena Dubal of University of California.
The KLOTHO gene affects a protein found in the kidneys and the brain that regulates many different body processes. About one in five people carry a single copy of the varian, known as KL-VS,which boosts levels of the protein and is associated with a longer lifespan and improved heart and kidney function. A small minority, 3% of the population, has two copies, which is linked to a shorter lifespan.
In the new study scientists scanned the brains of 422 men and women aged 53 and over who were also tested for the KLOTHO gene. They found that participants with a single copy of the gene variant also had a larger brain region known as RDLPFC, which is especially likely to shrink with age. Loss of neurons in this area may be one reason why older people are sometimes easily distracted and find it difficult to do more than one task at the same time.
Researcher Dr Jennifer Yokoyama said, “ The brain region enhanced by genetic variation in KLOTHO is vulnerable(脆弱的)in aging and some mental disease. In this case, bigger size means better function. It will be important to determine whether the structure increase associated with carrying one copy of KL-VS can offset the cognitive shortage caused by disease.”