【单选题】Passage 4 Questions 16 to 20 are based on the following passage: Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need. It has been demonstrated th...
A.
encourage rats to drink vitamin-enriched water
B.
find out rats preference in flavor
C.
test whether rats know which drink is good for them
【单选题】Passage 4 Questions 16 to 20 are based on the following passage: Movies are the most popular form. of entertainment for millions of Americans. They, go to the movies to escape their normal everyday ex...
【单选题】Passage 4 Questions 16 to 20 are based on the following passage: Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need. It has been demonstrated th...
A.
encourage rats to drink vitamin-enriched water
B.
find out rats preference in flavor
C.
test whether rats know which drink is good for them