Question

A new study suggests that the timing of a wound affects the speed at which it heals（痊愈）. Wounds suffered during the day heal around 60 percent faster than those at night.

The study showed how the bodies circadian rhythm（昼夜节律）controlled the healing of

wounds. 1. It tells our bodies when to wake up, eat and sleep in a circle—a series of activities that repeat themselves day after day. 2.

In the study, researchers found that skin cells moved faster to repair wounds suffered during the day. Their findings were published in the journal Science Translational Medicine.

The researchers examined cells, mice, and burn injury databases. 3.

Night-time burns—burns suffered between 8 o’clock at night and 8 o’clock in the next morning—were 95 percent healed after an average of 28 days.

But after an average of 17 days, daytime burns -burns suffered between 8 o’clock in the morning and 8 at night -were 95 percent healed. 4.

Wounds are very costly to treat. 5. In Britain’s National Health Services, for example, such services cost around $6.56 billion per year. Experts say the high costs result, in part, from a lack of drugs that speed up the closure of wounds.

A. Each cycle lasts about 24 hours.

B. The circadian rhythm is like a clock or timer.

C. Specifically, their investigation found the following information:

D. The new study’s findings could help scientists develop better drugs.

E. In other words, nighttime injuries took an average of 11 days longer to heal.

F. Worldwide, billions of dollars are spent every year on wound-treatment services.

G. That’s what a group of researchers from a university in Canada recently published.

Answer

1.B

2.A

3.C

4.E

5.F

【解析】本文主要讲了新的研究表明受伤的时间影响伤口愈合的速度。

1.语义理解题。第二自然段The study showed how the body’s circadian rhythm(昼夜节律) controlled the healing of wounds.这里提到了昼夜规律，故选B。（昼夜节律就像一个闹钟或是定时器。）

2.语义理解题。由第二自然段It tells our bodies when to wake up, eat and sleep in a cycle—a series of activities that repeat themselves day after day.可知这里意思是每个循环持续24小时，选A。

3.语义理解题。第四自然段___3___Night-time burns—burns suffered between 8 o’clock at night and 8 o’ clock the next morning—were 95percent healed after an average of 28 days.这些是调查研究结果，故选C。（他们的调查研究发现了如下信息。）

4.语义理解题。由第五自然段But after an average of 17 days, daytime burns-burns suffered between 8 o’clock in the morning and 8 o’clock at night—were 95 percent healed.可知这里意思是换句话说，夜晚时间的受伤愈合时间平均起来，要长于11天，选E。

5.语义理解题。由第六自然段Wounds are very costly to treat.和In Britain’s National Health Services, for example, such services cost around $6.56 billion per year. Experts say the high costs result, in part, from a lack of drugs that speed up the closure of wounds.可知这里提到了受伤治疗的花费问题，故选F。（世界范围内，每年用于受伤治疗服务的花费数以亿计。）