【简答题】Some desert animals can ___1___ the very strong summer heat and dryness because they have very unusual characteristics. The camel, for example, can hear an increase in the temperature of its body and ...
【单选题】The first is the wear-and-tear hypothesis that suggests the body eventually succumbs to the environmental insults of life. The second is the notion that we have an internal clock which is genetically ...
A.
There are two broad theories concerning what triggers a human's inevitable decline to death
B.
Some scientists believe that humans contain an “internal time clock” which forces them eventually to die.
C.
We all must die some day.
D.
My biology professor gave an interesting lecture Thursday.