In general, Comets have ______ orbits.
A. Elliptical
B. Highly elliptical
C. Circular
D. Parabolic
A. Elliptical
B. Highly elliptical
C. Circular
D. Parabolic
A. Jupiter
B. Venus
C. Mars
D. Mercury
A. River water
B. Canal water
C. Sea water
D. Water in a lake
A. Salt
B. Chlorine
C. Carbon dioxide
D. Water
A. 280,000 km/s
B. 300,000 km/s
C. 320,000 km/s
D. none of these
A. plasma
B. platelets
C. White blood cells
D. Red blood cells