A．To clarify a common misunderstanding.
B．To show in what way Earth is similar to a watch.
C．To emphasize the regularity of Earth's movements.
D．To connect the concepts of orbits and time.
A．It denied earlier evidence that Milankovitch found.
B．It led to new methods to measure global climate changes.
C．It helped Milankovitch first formulate his hypothesis.
D．It confirmed Milankovitch's hypothesis.
A．Inaccurate information about long-term climate changes.
B．Evidence that contradicted Milankovitch's hypothesis.
C．Evidence that climate changes occur only locally.
D．Variations in Earth's orbit that had little impact on climate.
A．Knowledge of one's own existence.
B．Knowledge acquired through the senses.
C．Knowledge humans are born with.
D．Knowledge passed down from the previous generations.