白内障手术中最常用的结扎10-0Nylon线的方法是（）。
NYLON610塑料其射出温度多少？
NYLON66塑料其射出温度多少？
下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
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Wonder Webs
? ?Spider webs
are more than homes, and they are ingenious traps. And the world’s best web
spinner may be the Goldern Orb Weaver spider. The female Orb Weaver spins a web
of fibers thin enough to be invisible to insect, ?yet {{U}}?(51)
?{{/U}} enough to snare a flying bird without breaking.
? ?The
secret of the web’s strength. A type of super-resilient {{U}}?(52) ?{{/U}}
called dragline. When the female spider is ready to {{U}}?(53) ?{{/U}} the
web’s spokes and frame, she uses her legs to draw the airy thread out through a
hollow nozzle in her belly. Dragline is not sticky, so the spider can race back
and forth along {{U}}?(54) ?{{/U}} to spin the web’s trademark
spiral.
? ?Unlike some spiders that weave a new web every day, a
Golden Orb Weaver {{U}}?(55) ?{{/U}} her handiwork until it fails apart,
sometimes not for two years. The silky thread is five times stronger than steel
by weight and absorbs the force of an impact three times better than Kevlar, a
high strength human-made {{U}}?(56) ?{{/U}} used in bullet-proof vests.
?And thanks to its high tensile strength, or the ability to resist breaking
under the pulling force called tension, a single strand can stretch up to 40
percent longer than its original {{U}}?(57) ?{{/U}} and snap back as well
as new. No human-made fiber even comes {{U}}?(58) ?{{/U}}.
?
?It is no {{U}}?(59) ?{{/U}} manufacturers are clamoring for spider
silk. In the consumer pipeline: high-performance fabrics for athletes and
stockings that never run. Think parachute cords and suspension bridge cables. A
steady {{U}}?(60) ?{{/U}} of spider silk would be worth billions of
dollars— but how to produce it? Harvesting silk on spider farms does not
{{U}}?(61) ?{{/U}} because the territorial arthropods have a tendency to
devour their neighbors.
? ?Now, scientists at the biotechnology
company Nexia are spinning artificial silk modeled after Goldern Orb dragline.
The {{U}}?(62) ?{{/U}} step: extract silk-making genes from the spiders.
Next, implant the genes into goat egg cells. The nanny goats that grow from the
eggs secrete dragline silk proteins in their {{U}}?(63) ?{{/U}}. "The
young goats pass on the silk-making gene without {{U}}?(64) ?{{/U}} help
from us," says Nexia president Jeffrey Turner. ?Nexia is still perfecting
the spinning process, but they hope artificial spider silk will soon be snagging
customers {{U}}?(65) ?{{/U}} the real thing snags
bugs. |
A:cloth B:silk C:nylon D:wool
DEAR SIRS
BEIJING,NOVERMBER 5,1999
THANK YOU FOR YOUR ENQUIRY OF OCTOBER 30 FOR WOMEN`S NYLON GARMENTS.IN COMPLIANCE WITH YOUR REQUEST,WE HAVE ENCLOSED A PRICELIST AND AN ILLUSTRATED BROCHURE. ALTHOUGH WE STILL HAVE CERTAIN AMOUNT OF STOCK WE CAN HARDLY KEEP
THEM FOR A LONG TIME BECAUSE OF THE HEAVY DEMAND.SAMPLES WILL BE SENT ON REQUEST.
WE ARE LOOKING FORWARD TO YOUR EARLY REPLY
YOURS FAITHFULLY,BEIJING GARMENTS IMP/EXP CORPORATION
INCOMING LETTER
DEAR SIRS,
MANY THANKS FOR YOUR QUOTATION OF NOVEMBER 5 AND THE SAMPLES OF WOMEN`S NYLON GARMEHTS.WE ARE SATISFIRED WITH THE
QUALITY AND PLEASED TO ENCLOSE OUR ORDER NO.333FOR SIZES MENTIONED IN YOUR LATEST CATALOGUE.
WE NOTE THAT YOU CAN SUPPLY THESE ITEMS FORM STOCK AND HOPE YOU WILL SEND THEM BEFORE DECEMBER 31.OUR COMPANY WILL
RESERVE THE RIGHT TO CANCEL THIS ORDER OR REJECT THE GOODS FOR ANY LATE ARRIVAL.
FOR YOUR REFERENCE,WE WISH TO EFFECT PAYMENT BY D/P 60DAYS.PLEASE KINDLY LET US HAVE YOUR CONFIRMATION.
ORDER
NO.333
BEIJING GARMENTS IMP/EXP CORP
BEIJING,CHINA
PLEASE SUPPLY THE FOLLOWING ITEMS:
QUANITY(DOZ) ITEM SIZE UNIT PRICE(PER DOZ)CIF LONDON
15 WOMEN`S NYLON GARMENTS SMALL US$75.00
16 DITTO MEDIUM US$110.00
14 DITTO LARGE US$150.00
(1) Outgoing Letter Beijing, November 5, 1000 Dear Sirs, Thank you for yourenquiry of October 30 for Women’s Nylon Garments. In compliance with your request, we have enclosed a price list and an illustrated brochure. Although we still have certain amount of stock we can hardly keep them for a long time because of the heavy demand. Samples will be sent on request. We are looking forward to our early reply. Yours faithfully, Beijing Garments Imp/Exp. Corporation (2) Incoming Letter Dear sirs, Many thanks for your quotation of November 5 and the samples of Women’s Nylon Garments. We are satisfied with the quality and pleased to enclose our Order NO. 333 for 3 sizes mentioned in your latest catalogue. We note that you can supply these items from stock and hope you will send them before December 31. Our company will reserve the right to cancel this order or reject the goods for any late arrival. For your reference, we with to effect payment by D/P 60 days. Please kindly let us have your confirmation. ORDER NO. 333 Beijing Garments Imp/Exp. Corp. Beijing, China Please supply the following items: Quantity (Doz) Item Size Unit Price (Per doz) CIF London 15 Women’s Nylon Garments Small US$75.00 16 ditto Medium US$110.00 14 ditto Large US$150.00 London Trading Co. Ltd. (3) Outgoing Letter Dear Sirs, We’ve received your letter of November 13 and your Order No. 333. Much to our regret, we can hardly accept your order at the prices you bid since the prices of raw materials have increased recently. We’re afraid the best we can do is as follows: Commodity Unit Price (Per doz) CIF London Size Quantity(doz) Woman`s Nylon Garments USD80.00 Small 15 Woman`s Nylon Garments USD120.00 Medium 16 Woman`s Nylon Garments USD160.00 Large 14 As to payment terms, we usually require letters of credit. However, in view of our long and pleasant relations, we will accept D/P 60 days this time. But it must be clearly understood that, in so doing, we are not establishing a precedent. We hope you will accept our prices and give us a reply an soon as possible. Yours faithfully, (4) Incoming Letter Dear Sirs, Your letter of November 20,1999 has been received. As we are anxious to finalize this transaction, we have been exerting ourselves to persuade our clients to accept your prices. Eventually, they have decided to accept. We are glad to have been able to conclude the business with you and await your sales confirmation. Yours faithfully, (5) Outgoing Letter Dear Sirs, We’re glad that your clients have accepted our prices, which are narrowly calculated. These goods will be packed in boxes of half dozen each and 10 dozen to a carton, and shipped in December from China port to London with transshipment and partial shipments allowed. Insurance is to be covered by us against ALL Risks and War Risk for 100% of the invoice value. Enclosed is our Sales Contract No.116 signed in Beijing on 28th November, 1999 in duplicate, a copy of which please sign and return. Yours faithfully, CONTRACT No.______________ SELLERS: BUYERS:This Contract is made by and between the Buyers and the Sellers, whereby the Buyers agree to buy and the Sellers agree to sell the under - mentioned commodity according to the terms and conditions stipulated below: Commodity Size Quantity (doz) Price per doz CIF London Amount Total Value: Packing: Shipping Mark: Insurance: Time of Shipment: Port of Shipment: Port of Destination: Terms of Payment: Done and signed in on this day of
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