阅读理解
Busy senior managers need no longer waste time in showering themselves-an Australian company has
invented a suit that can be worn while they wash.
The suit has been specially designed so that it can be cleaned under the showerhead.There is no need
for soaking (浸泡), dry cleaning-or even soap.
The Japanese market has taken a liking to the "shower suit", described as "revolutionary" by its owner Australian Wool Innovation (AWI), which is the research and marketing body that represents 
Australian
woolgrowers.Orders have been placed for 170,000 of the woolen suits.
The suit could be worn in the shower, although it was probably better to hang it on a clothes hanger
and carry it instead, AWI corporate affairs spokesman Stephen Feighan said."The idea is that you hang it
up and then...you give it a spray (喷雾), and it's dry the next morning, " Mr Feighan said.
A Japanese researcher working for AWI invented the suit by combining three technologies.The secret
is the best lining (内衬), which allows the suit to dry quickly.The shower suit attracted busy corporate
people, particularly those who often traveled or stayed up late, Mr Feighan said.The airline industry was
also interested.
Mr Feighan confessed he had not worn one of the suits yet, or tried to wash it in the shower, because
they cut to fit Japanese figures.
AWI believes that the shower suit will spread from the Japanese market through Europe and India.
Mr Feighan hoped the suit, made from local wool, would be available in Australia in 12 to 18 months'
time.
1. What is the writing purpose of the article?
A. To introduce a newlydesigned shower suit.
B. To help the white collars arrange their life more sensibly.
C. To provide suggestions on saving time in bath.
D. To praise AWI for its important achievement.
2. Which is true about the suit according to the passage?
A. It can spare the owner's trouble of soaking, dry cleaning and applying soap.
B. It is of the quality of fast dry for its best cloth.
C. It is not suitable for hanging.
D. It has attracted more orders than any other suit.
3. The suit draws the attention from all the following groups EXCEPT________.
A. corporate people who are always on the go
B. people on occasional business trips
C. the airline industry
D. people burning the midnight oil
4. Which of the following has much to do with Mr Feighan?
A. The invention of the suit.
B. The tryon of the suit.
C. The combination of the three technologies on the suit.
D. The popularization of the suit and best wishes for it
5. It can be inferred from the passage that________.
A. Australians prefer foreign markets to the domestic one
B. wool is the most favorite material for clothing
C. westerners have different body sizes and figures from easterners
D. Australia's economy will not recover within a year
从空气入射到厚度为d、折射率为n的塑料保护层后，聚焦到信息记录层的光斑宽度为a，才能有效获取信息。在保证a不变的前提下，减小激光束照到塑料保护层的宽度
( ι =a+2b)，则
，式中r为折射角，
，解得
，A正确、B错误；要保证a不变的前提下，减小宽度b，由以上公式的求解过程得
，故在θ和n不变时，减小d，或在θ和d不变时，增大n，或在n和d不变时，减小θ，C正确、D错误。