题目内容：

In a strange example of “art inspires life”，the self­drying jacket that Marty McFly wore in the movie，Back to the Future Ⅱ，has actually become a reality. A model has already been created and a Kickstarter campaign plans to raise funds for mass production.

The jackets，named SDJ­01，are classified as wearable tech，because of the inner air circulation(环流；循环) system that speeds the drying process from the inside out. Under normal circumstances，you can expect the jacket to dry in about 1－2 minutes after being exposed to rain or a spilled drink. If you jump into a pond to escape danger，it will probably take longer.

“Think of how quickly your clothes dry when you turn a standard fan on them. Now imagine how quickly breathable(透气的)，water resistant(抗……的) material dries when exposed to concentrated，high­pressure air. In lab tests，our jacket consistently experienced noticeable drying effects after just 30 seconds，with the average time of about a minute to achieve a 90% drying effect，” explained Aaron Coleman，lead designer at Falyon Wearable Tech，which is producing the jacket.

“This is something that has been on my mind for years，” he said. He didn’t want it to be just a movie prop，but an actual usable jacket. “We wanted to follow the basic design of the jacket from the movie Back to the Future Ⅱ but update it a bit，adding more pockets for all the things people carry around these days.”

Eventually，Coleman and his team hit upon the perfect combination of water resistant material and high­pressure air circulation to achieve complete drying in just one minute. The outer layer is made of water resistant nylon，with insulation(绝缘材料) made of polyester fibre on the inside. It dries itself through a couple of so­called “air amplifiers(放大器)” attached to the sides，which force more air through the jacket.

According to the makers，the SDJ­01 is ideal for rainy days and spills，and the fans are perfect to cool off on days “when you’re just a little too warm，but it’s too cold to take off your jacket”．

1.How long does the SDJ­01 take to achieve a 90% drying effect，on average?

A. About 30 seconds.

B. About a minute.

C. About 1－2 minutes.

D. Longer than 2 minutes.

2.According to Aaron Coleman，in what way is the design different，compared with the jacket in Back to the Future Ⅱ？

A. The number of pockets.

B. The function of pockets.

C. The colour of pockets.

D. The shape of pockets.

3.What is the main achievement by Coleman and his team in developing the SDJ­01?

A. The noticeable drying effects of high pressure air on wet clothes.

B. The inner air circulation system can speed the drying process from the outside.

C. The perfect combination of water resistant material and high­pressure air circulation.

D. The various functions of water resistant materials during rainy days and spills.

4.What is the main idea of the passage?

A. The ideal design of a self­drying jacket.

B. Marketing strategies for a self­drying jacket.

C. The development of a self­drying jacket.

D. A basic introduction to a self­drying jacket.