About one million years ago, the Ice
Age began. The Ice Age was a long period of time in which four great glaciers
pushed southward to cover almost all the upper half of North America, and then
melted away. Each glacier was a thick sheet of ice and snow that spread out from
a centre near what is now Hudson Bay in Canada. The winters were long, and the
cool summers were too short to melt much of the ice and snow. The ever-growing
sheet built up to a thickness of two miles at its centre. As all
glaciers do, these great glaciers slid. They pushed down giant trees in their
paths and scraped the earth bare of soil. Many animals moved farther south to
escape. Others stayed and were destroyed. When winters of little
snow came, the summer sun cut into the edges of the ice sheets. As the glaciers
melted, rocks, soil and other things A. the Ice Age was a long period of time B. great glaciers covered North America many years ago C. changes in climate helped to melt the glaciers D. how glaciers changed North America
[单项选择]What happened to the man four years ago A. He had a minor operation. B. He had pneumonia. C. He had a car accident. D. He had long aftereffects.
[单项选择] Passage One
About four years ago, Kerry Sturgill
found herself at a career crossroads: Should she stay in an industry populated
by extroverts(外向型的人) or jump ship to a more reflective place where introverts
like her were in the majority Career counselors had told her to
get out of the highly extroverted public relations fields " so you can be happy
and do what you are. " Among the less fast-paced areas they pointed to: art,
scientific research, data analysis. Such a move is definitely
the right road for many introverts struggling to fit into an extroverted
workplace. So, just what is an introvert anyway It’s someone
who is energized by thought and reflection, while extroverts are energized by
socializing. Introverts naturally need to think before they speak.
Extroverts use the speaking process to figure out what it is they want t A. introverts should try to avoid working in a highly extroverted environment B. introverts should try to change themselves to fit into an extroverted working environment C. extroverts should work in less fast-paced areas such as art and scientific research D. introverts can be happier if they can find jobs in the field of public relations
[单项选择] Modern Drugs
Doctors, sixty years ago, could do little to help victims of polio. Serious cases usually ended in death. In 1955, a vaccine was developed that prevented the disease. Today, polio is no longer a major health problem.
Many of the most important drugs that doctors prescribe today have been developed in the last 30 years. Modern drugs are complex, specific and powerful. People need to know more about drugs in order to use them safely.
Early people discovered by accident that some of the plants growing around them seemed useful to heal sores, relieve pain, or even cure diseases. These plants were the first drugs. Now plants are still the source of some drugs. Quinine, for example, is a bitter-tasting drug used to treat the chills and fever of malaria and to reduce attacks of the disease. It is made from the bark of the cinchona tree, which grows in the Andes Mountains. The Indians of that region were the first to use the bark as A. Originally, quinine was made from some tree bark. B. Quinine is used to cure malaria. C. Now, the cinchona tree is no longer the only source of quinine. D. It was the Spanish people who first used quinine as a medicine.
购买搜题卡查看答案
[会员特权] 开通VIP, 查看 全部题目答案
[会员特权] 享免全部广告特权
请选择支付方式
-
微信支付
-
支付宝支付
立即支付
系统将自动为您注册账号
请使用微信扫码支付
请不要关闭本页面,支付完成后请点击【支付完成】按钮
恭喜您,购买搜题卡成功
重要提示:请拍照或截图保存账号密码!
我要搜题网官网:https://www.woyaosouti.com
我已记住账号密码
| |