Crowdly

produces less heat

is made from different materials

uses a red plastic filter, not a green one

30. The word 'conventional' in paragraph 6 is closest in meaning to

powerful

experimental

inexpensive

standard

29. The electricity to power WLEDs in rural villages would come directly from

water power

the energy of the sun

a human-powered generator

batteries

21. In paragraph 2, which of the following is NOT mentioned as one of the problems with fluorescent lights?

Their tendency to flicker

The need to replace them often

An annoying sound

The harsh quality of the light they produce

25. It can be inferred from the passage that the most recently developed type of LED is a powerful

green LED

blue LED

white LED

red LED

26. In paragraph 4, the author compares one type of WLED with fluorescent light because they both

employ a chemical coating

use ultraviolet light

are filled with gas

are energy efficient

24. In paragraph 5, what achievement of Shuji Nakamura does the author mention?

He invented the first WLED.

He found a way to combine blue, green, and yellow LED light.

He developed a bright blue LED.

He discovered the chemical compound gallium nitride.

20. What is NOT mentioned as a factor that make an athlete successful?

nationality

genetics

cultural background

practice

19. What does Greg Louganis do?

diver

swimmer

a marathon runner

weightlifter

11. What is the passage mainly about?

the size of a super athlete

how to qualify for the Olympics

factors that make someone a super athlete

the different muscle types of a super athlete