单项选择题


Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage.
Just like the author stated here,

A.the brain of an elephant accounts for 1/50 of his total weight.
B.many kinds of animals have brains larger than men have.
C.man’s brain seldom weighs much over three pounds.
D.in proportion to his total weight, man’s brain is the largest of animal brains.