illustration()
A.noun. 图表,插图;图解;图示;例释
B.noun. 错误的观念;幻想;幻想的事物;错觉
C.verb. 照明;照亮;照射;阐明
D.不会
NOUN图表插图;图解;图示;例释;
A.noun. 图表,插图;图解;图示;例释
B.noun. 错误的观念;幻想;幻想的事物;错觉
C.verb. 照明;照亮;照射;阐明
D.不会
NOUN图表插图;图解;图示;例释;
A.The penny that doubles itself every day for one month
B.The time span of at least two million years in human history
C.An illustration of the exponent growth rate given by the author
D.The large amount of money you would luckily make after the fourth week
century by the Italian naturalist Lazzaro Spallanzani.He caught some bats in a bell tower,blinded them,and released them outdoors.Four of these blind bats were recaptured after they had found their way back to the bell tower,and on examining heir stomachs‘ contents,Spallanzani found that
they had been able to capture and gorge themselves with flying insects.We know from experiments that bats easily find insects in the dark of night , even when the insects emit no sound that can be heard by human ears.A bat will catch hundreds of soft-bodied,silent-flying moths or gnats in a single hour.It will even detect and chase pebbles or cotton spitballs tossed into the air.
16.According to the author,the sonar system of bats is an example of the idea that.()
A.this is the age of technological triumphs
B.modern machines are inefficient
C.living mechanisms are often more efficient than man-made
machines
D.artificial imitations are always less efficient than living
mechanisms
17.The author suggests that the sonar system of bats ().
A.was at the height of its perfection 50 million years ago
B.is better than man-made sonar because it has had 50 million years to be refined
C.would have been discovered by man many years ago
D.is the same as it was 50 million years ago
18.The fact that“blind bats”will detect and chase cotton spitballs as well as insects is remarkable because.()
A.bats do not eat spitballs
B.cotton is harder to track
C.Spitballs make no sounds audible to human ears
D.there is purpose in the flight of insects
19.This passage was written to illustrate().
A.the deficiencies of man-made sonar
B.the dependence of man upon animals
C.that we are living in a machine age
D.that the sonar system of bats is remarkable
20.Which of the following is the main point of the passage?()
A.A bat will catch hundreds of gnats in a single hour
B.Here is a perfection in nature which sometimes cannot be matched by man‘s creative efforts
C.The phrase“blind as bat”is valid
D.director of NIH learned of the abuse