Mar. 10, 2006
Dear Sirs,
We are delighted to tell you that we have a great interest in Chinese Folding Fans.
Will you please send us your catalogue and full details of your export prices and terms of payment (付款条件), together with any samples you can let us have.
If your prices are competitive, we believe we can place regular orders with you.
We look forward to receiving your reply.
Yours faithfully,
Martin Smith
Letter Two
Mar. 25, 2006
Dear Mr. Martin Smith,
It's so nice to receive your letter of March 10. Thank you for your interest in our products.
Full details of our export prices are enclosed with this letter. We are also sending you an illustrated catalogue together with a range of samples. Our terms of payment are cash on delivery (货到付款).
Our products are famous both for their excellent quality and for their fine workmanship. They are very popular in Western markets, in which we have had some experience.
We are sure that these goods will meet your requirements, and we look forward to your first order.
Sincerely yours,
Li Jiang
What products are the two letters dealing with?
A、and
B、but
C、so
D、for
Making Light of Sleep
All we have a clock located inside our brains. Similar to your bedside alarm clock, your intemal clock runs on a 24-hour cycle.-This cycle, called a circadian rhythm, helps control when you wake,when you eat and when you sleep.
Somewhere around puberty, something happens in the timing of the biological clock. The clock pushes forward, so adolescents and teenagers are unable to fall asleep as early as they used to. When your mother tells you it&39;s time for bed, your body may be pushing you to stay up for several hours more.
And the light coming from your computer screen or TV could be pushing you to stay up even later.
This shift is natural for teenagers. But staying up very late and sleeping late can get your body&39;s clock out of sync with the cycle of light and dark. It can also make it hard to get out of bed in the morning and may bring other problems, too. Teenagers are put in a kind of a gray cloud when they don&39;t get enough sleep, says Mary Carskadon, a sleep researcher at BrownUniversity. It affects their mood and their ability to think and learn.
But just like your alarm clock, your internal clock can be reset. In fact, it automatically resets itself every day. How? By using the light it gets through your eyes. Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal clocks. For years,researchers thought that the signals that synchronize the body&39;s clock were handled through the same pathways that we use to see.
But recent discoveries show that the human eye has two separate light-sensing systems. One system allows us to see. The second system tells our body whether it&39;s day or night.
The clock located inside our brains is similar to our bedside alarm clock because __________. 查看材料
A.it controls when we wake, when we eat and when we sleep
B.it has a cycle of 24 hours
C.it is a cycle also called circadian rhythm
D.it can alarm any time during 24 hours
B.胎儿电子监护
C.胎教
D.胎动计数
E.B超检查
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