更多"Wind power are being used to genera"的相关试题:
[填空题]Wind power are being used to generate (electronic) ______ .
[填空题]Wind power are being used to generate (electrical)（）
[填空题]Capital is being used more efficiently because it is ______.
[填空题]Language is best taught when it is being used to transmit______.
[单项选择]Passage Five
A wind tunnel is used for testing planes or plane models. In a wind tunnel air is blown over a plane or a model placed in a test section. Wind tunnel test sections are different in size depending on airflow speed requirements. Some low-speed tunnels have test sections large enough for a complete small plane. In the very high speed tunnels used for space testing, however, the model may be as small as a pencil.
There are two ways of feeding air to the test section. In the constant flow tunnel, airflow produced by electric fans is forced through the tunnel to the test section, then through another tunnel section back to the starting point for reuse. The other way involves storing high-pressure air in a box, sending it out by a controlling device to pass through the tunnel and test section into another box. This way is usually used for a very short period of high-speed airflow.
Wind tunnels are usually used to test planes before they are flown. Problems in a plane
A. they are used for large planes
B. they can produce a stronger wind
C. they are built to conduct a high-speed test
D. the air in them flows at a lower speed
[简答题]
Passage Five
Americans are used to being warned for their self-destructive
fondness for cheese-flavored snacks(有乳酪味道的快餐). But citizens of developing
countries are also unable to escape the danger of the First World’s fat-rich
diet and couch potato ways. At last week’s 8th International Congress on
Obesity(肥胖), held in Paris, researchers warned that the planet’s expanding
waistlines threaten "to become the curse of the next millennium(千年)".
"We used to consider obesity a problem of industrialized, rich countries,"
says Arnaud, a member of the meeting’s lead committee. "But now it has become a
world disease."
Researchers blame the trend -- and the attendant
rise in the incidence of heart disease and diabetes(糖尿病) -- on the Third World’s
increasing wealth, reduced physical activity, and more calorie-laden diets. As a
result, the World Health Organization has estimated that 300 million people will
be obese by 2025, an increase of 50 million
[单项选择]The price of electricity produced using wind power is A. lower than the price of electricity produced using coal. B. expected to fall below that of electricity produced using coal. C. expected to fall to a level closer to that of electricity produced using coal.
[简答题]
Americans are used to being warned for their self-destructive fondness for cheese-flavored snacks(有乳酪味道的快餐). But citizens of developing countries are also unable to escape the danger of the First World’s fat-rich diet and couch potato ways. At last week’s 8th International Congress on Obesity(肥胖), held in Paris, researchers warned that the planet’s expanding waistlines threaten "to become the curse of the next millennium(千年)".
"We used to consider obesity a problem of industrialized, rich countries," says Arnaud, a member of the meeting’s lead committee. "But now it has become a world disease."
Researchers blame the trend -- and the attendant rise in the incidence of heart disease and diabetes(糖尿病) -- on the Third World’s increasing wealth, reduced physical activity, and more calorie-laden diets. As a result, the World Health Organization has estimated that 300 million people will be obese by 2025, an inc
