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何谓性别决定？何谓性别分化？

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[A] showed up
[B] turned back
[C] moved on
[D] ran away

What is the purpose of writing these three texts7
[ A] To make tne books easier to read.
[B]To show the importance of science.
[ C]To introduce new authors.
[D]To sell the books.

Text 5
Kenya Wddlife Safari from ￡ 995
DAY l LONDON/NAIROBI
Daylight flight to Nairobi. On arrival, check in at the Holiday Inn Mayfair Court.
DAY 2-4 SAMBURU AND TREETOPS
Set off on safari, driving north, to the west of Mount Kenya and across the equator (赤道) .
2 nights at Samburu Lodge, including afternoon and morning game drives. Continue south to the Aberdare Mountains and the world famous Treetops, where we amve in time for tea on the rooftop platform, where you can watch the animals come down to the waterhole.
DAY 5 LAKE NAIVASHA
Continue from Thomason's Falls to Lake Nakuru. As well as the interesting bird life , it is here that you will have the best chance of seeing the black thino (犀牛) . Overnight at the Lake Hotel,Naivasha.
DAY 6-8 MASAI MARA
After a restful moming in this lovely lakeside setting, we drive to the Masai Mara game area
for a 3 night-stay at Keekerok Lodge. The vast plains of the Mara reach the Tanzanian border
where they join the famous Serenget , covering an area of over 6,000 square miles. The Mara is home to countless thousands of animals. Head out for morning and afternoon game drives.
DAY 9 MASA MARA/NAIROBI/LONDON
Return to Nairobi for your ovemight flight back to London.
72. This text is written mainly for people interested in________ .
[A] traveling long distance
[B] spending nights outdoors
[C] watching animals in the wild
[D] seeing different kinds of plants

C
Computer people talk lots about the need for other people to become " computer literate " . But
not all experts think it a good idea.
Onepioneer, in particular, who disagrees, is David Debut, the founder of Computer town
UK. Though many people see this as a suc'cessful attempt to bring people closer to the computer,
David does not see it that way. He says that Computer town UK was formed for just the opposite
reason, to bring computers to people and make them "people literate".
David Debut thinks Computer towns are most successful when tied to a computer club but he
thinks there is an important difference between the two. The clubs are for people who have some
computer knowledge already. This frightens away non-experts, who want to go to Computer towns
where there are computers for them to operate, with experts to encourage them and answer any
questions they ask. They are not told what to do, they find out. The computer experts have to learn
not to tell people about computers, but have to be able to answer all questions people ask. People needn ' t leam computer terms(术语) . But the experts have to explain in plain language. The computers are becoming " people literate" .
64. Which of the following is David Debut ' s idea on the relationship between people and com-
puters？
[ A] Computer learning should be made easier.
[ B ] There should be more computer clubs for experts.
[ C ] People should work harder to master computer use.
[D] Computers should be made cheaper so that people can afford them.