section iv writing
( 40 minutes )
you should write your responses to both parts on answer sheet 2.
part a
66. write a note to explain why you were absent from the night class.
part b
67. for this part, you are required to write a composition based on the following table of the brain and the computer. your composition should be no less than 150 words.
the brain and the computer
braincomputersizeone tenth of a cubic foothundreds of cubic feet of spaceelectrical energy used25 watts of electrical power100,000 watts of electrical powerstructure of cellsdirectly connected to many other cellsunconnected cells like a cell of pigeonholes （鸽巢分类架）capacitybetween 10 billion and 100 billion items of informationa few billion items of immediately accessible information, no thinking capacity