A:正常工作时,电冰箱的电压最高
B:正常工作时,三个用电器的电功率一样大
C:正常工作时,通过空调的电流大于通过电视机的电流
D:在一个月内,空调的用电费用一定比电视机的用电费用多
两个直角三角形全等的条件是( )
善于竞争、合作是我们成长和发展中必须具备的能力和素质。初中毕业后,我们每个同学都将进入新的环境去学习或工作,结合所学知识,简要回答我们应该怎样参与竞争、合作?
With the development of science and technology, our daily life is becoming more colorful and more convenient .
An Underwater Hotel
It looks like a spaceship but it is actually a picture of an underwater hotel. A company plans to build in the sea which is about 18 metres below the surface. The whole building is underwater and you can get to it by swimming and diving.
Google Glass
Google Glass is a pair of glasses with a battery hidden inside the frame(边框). It can perform many of the same tasks as smart phones. The glass has a hidden camera and a tiny screen. It is designed to take hands-free photos or videos of anything people are doing.
A New Kind of Shirt
Hate washing clothes? You're going to love this kind of shirt made by an American clothing company, Wool & Prince. This shirt can be worn for 100 straight days without washing! The Wool & Prince shirt never needs ironing(熨烫).
The Digital Library
Can you imagine walking into a library and finding all books have turned into computers? The first bookless public library is planned to open in San Antonio, Texas. Computers will take the place of books soon.