A. Liver
B. Spleen
C. Pancreas
D. None of these
Television signals are converted into light signals by___________?
A. Optical fiber
B. Transistor
C. Decoder
D. Photo diode
E. None of these
A. 746 mm
B. 760 mm
C. 820 mm
D. None of these
A. Lion
B. Zebra
C. Dolphin
D. Giraffes
Giraffes do have a larynx (voice box), but perhaps they couldn’t produce sufficient airflow through their 13-foot long (4 meter) trachea to vibrate their vocal folds and make noises. The researchers suspected the reason no one heard giraffe communication was because the sound frequency was too low for humans to hear.
A. Mango
B. Grapes
C. Tomato
D. Guava
Human population growth is greatest in develog countries because ?
A. the birth rate is high in develog countries
B. the death rate is high in develog countries.
C. much of the population has already reached the child bearing age.
D. most of the world’s population lives in industrialized countries.