一份特别好的英语试题

55. The last sentence of paragraph 5 “We shall also, of course, be forced to … with

your company” suggests that _______.

A. the company may stop trading with the watch manufacturers.

B. the company will probably reduce the number of watches to be ordered in the

future.

C. the writer is afraid their company might go out of business soon.

D. the company is probably willing to give the manufacturers another chance

56. The general attitude of the letter is ________.

A. firm but polite B. angry and impolite

C. reasonable but impolite D. regretful and polite

D

Scientists have devised a way to determine roughly where a person has lived

using a strand of hair, a technique that could help track the movements of criminal

suspects or unidentified murder victims.

The method relies on measuring how chemical variations in drinking water show

up in people’s hair.

“You’re what you eat and drink, and that’s recorded in your hair,” said Thure

Cerling, a geologist at the University of Utah.

While U.S diet is relatively identical, water supplies vary. The differences result

from weather patterns. The chemical composition of rainfall changes slightly as rain

clouds move.

Most hydrogen and oxygen atoms in water are stable, but traces of both

elements are also present as heavier isotopes (同位素). The heaviest rain falls first.

As a result, storms that form over the Pacific deliver heavier water to California than

to Utah.

Similar patterns exist throughout the U.S. By measuring the proportion of heavier

hydrogen and oxygen isotopes along a strand of hair, scientists can construct a

geographic timeline. Each inch of hair corresponds to about two months.

Cerling’s team collected tap water samples from 600 cities and constructed a map

of the regional differences. They checked the accuracy of the map by testing 200 hair

samples collected from 65 barber shops. They were able to accurately place the hair

samples in broad regions roughly corresponding to the movement of rain systems.

“It’s not good for pinpointing(精确定位),” Cerling said. “It’s good for eliminating

many possibilities.”

Todd Park, a local detective, said the method has helped him learn more about an

unidentified woman whose skeleton was found near Great Salt Lake.

The woman was 5 feet tall. Police recovered 26 bones, a T-shirt and several

strands of hair.

When Park heard about the research, he gave the hair samples to the

researchers.

Chemical testing showed that over the two years before her death, she moved about

every two months.

She stayed in the Northwest, although the test could not be more specific than