These samples have to be（）in certain kind of chemical water in order to protect them.

andwriting samples to choose employees.(翻译)

ese creatures have some___26_____skills that could help the treatment of human diseases.

Pigeons are often seen as dirty birds and an urban__27______, but they are just the latest in a long line of animals that have been found to have abilities to help humans. Despite having a brain no bigger than the___28_____of your index finger, pigeons have a very impressive___29_____memory. Recently it was shown that they could be trained to be as accurate as humans at detecting breast cancer in images.

Rats are often___30_____with spreading disease rather than____31____it, but this long-tailed animal is highly___32_____. Inside a rat's nose are up to 1,000 different types of olfactory receptors(嗅觉感受器), whereas humans only have 100 to 200 types. This gives rats the ability to detect__33______smells. As a result, some rats are being put to work to detect TB(肺结核). When the rats detect the smell, they stop and rub their legs to___34_____a sample is infected.

Traditionally, a hundred samples would take lab technicians more than two days to___35_____, but for a rat it takes less than 20 minutes. This rat detection method doesn't rely on specialist equipment. It is also more accuratethe rats are able to find more TB infections and, therefore, save more lives.

A) associatedI) slight

B) examine

C) indicate

D) nuisance

E) peak

F) preventing

G) prohibiting

H) sensitive

I) slight

J) specify

K) superior

L) suspicious

M) tip

N) treated

O) visual

()separate cover, we have already sent you samples () various sizes of shoes.

A、Below,of

B、Under,of

C、By,of

D、By,including

Half dozen samples of both have been shipped to you by UPS.The products are the result of years of research,and are likely to revolutionize all the chemical methods in use at present.A trial will convince you of their merits.

mined them you will agree the goods are both excellent ______ quality and reasonable ______ price．

een taken．

A.topped up

B.braced

C.tommed down

D.re-pressurized

Dear Sirs,

From the samples sent to us on May 4,we have made selections,and have the pleasure of handing you the following ordeg which we commend to your immediate and bet attention：

360 chests Black Chocolate

400 sacks Fruit Candy(5009 for each)

Kindly forward these by fast freight.Enclosed please find a draft as per memorandum bill you sent LIS.

Yours truly,

Wang Qian

General Manager

w ______ and are sending them to you under _______ cover.

A、models/the same

B、designs/separate

C、styles/another

D、makes/other

current market conditions and on customers' comments．For Party A's reference，Party B shall，from time to time，forward to Party A samples of similar commodity offered by other suppliers，together with their prices，sales position and advertising materials．