总需求曲线是一条向下倾斜的曲线（）。 A.表明总需求的数量与价格水平的关系 B.表明

曾经广泛采用过X.25网的是______。

A．局域网

B．广域网

C．城域网

D．阿帕网

A low-carbon lifestyle means cutting carbon dioxide emissions and living a life characterized by low-energy use, low consumption and low spending. This way of living is being accepted by a growing number of average people in China.

Before low-carbon became a popular word here, some environmentally conscious people known as "Lohas" had already devoted themselves to living green, low-carbon lifestyles. Lohas is for "lifestyles of health and sustainability." It was first introduced in 1998 by American sociologist Paul Ray and later became a popular lifestyle in western countries. After this concept was introduced into China a few years ago, Lohas was translated into a proper Chinese word "lehuo," meaning happy living.

Zhang Tao from a joint venture in Beijing is a Lohas supporter and follower. He and some others set up a Lohas club two years ago. They often get together to share their experiences about living green lifestyles or to volunteer for environmental protection activities.

Zhang says Lohas is both a lifestyle and an attitude towards life rather than just a fashion or slogan.

"A Lohas lifestyle means a natural and healthy life with low costs. We don't drive cars, and we try our best to save water and electricity. Some people misunderstand us as being too stingy. But in fact, most of us are well-paid. We don't do it to save money, but for the sake of the environment. Living a rich life doesn't mean you can waste resources. We hope what we do can help save energy and reduce the pressures on earth. I know our personal strength is too small, but the changes will be great if everyone can make a little contribution."

64. A low-carbon lifestyle has the following features except_______.

A. low energy     B. low wages     C. low consumption   D. low spending

65. A Lohas is most likely to_______.

A. drive a car to work every day   B. save money to live a better life

C. turn off the tap when not using   D. leave the light on day and night

66. What does the word “stingy” mean in the last paragraph?

A. generous               B. mean              C. rich                D. willing

67. In Zhangtao’s opinion, _________.

A. Lohas is just a fashion or form     B. one shouldn’t get well paid

C. one should live a happy life             D. environment protection depends on everyone

在钩端螺旋体病血清学试验中，国内以下哪种试验有较高的特异性和敏感性（）

A.显凝试验

B.炭凝试验

C.红细胞凝集试验

D.冷凝集试验

E.补体结合试验

PRS700出现主电，整流器告警，但机房电压正常，只是告警模块上有告警应如何处理？

个性心理