According to the passage, which of the following is NOT true?A.The internal clock of us go
According to the passage, which of the following is NOT true?
A.The internal clock of us governs our cycles of alertness and sleep.
B.The internal clock of us can produce jet lag.
C.Long time in the biological darkness is fine to Americans.
D.During the winter in the northeast of America, a person can commute roundtrip in the dark.