¡¡¡¡41.
¡¡¡¡£¨a£© a regular class will be given.
¡¡¡¡£¨b£© an optional review class will be given.
¡¡¡¡£¨c£© an exam will be given.
¡¡¡¡£¨d£© class will be canceled.
¡¡¡¡42.
¡¡¡¡£¨a£© rock formations in the nevada desert.
¡¡¡¡£¨b£© graduate studies in anthropology.
¡¡¡¡£¨c£© excavation techniques used in archaeology.
¡¡¡¡£¨d£© prehistoric desert people of nevada.
¡¡¡¡43.
¡¡¡¡£¨a£© they planned their migrations.
¡¡¡¡£¨b£© they didn't travel far from their base camps.
¡¡¡¡£¨c£© they hid from their enemies in caves.
¡¡¡¡£¨d£© they planted seeds near their camps.
¡¡¡¡44.
¡¡¡¡£¨a£© they had trouble finding it.
¡¡¡¡£¨b£© lack of light made it impossible.
¡¡¡¡£¨c£© it was too small for a group to fit into.
¡¡¡¡£¨d£© items stored by others took up most of the space.
¡¡¡¡45.
¡¡¡¡£¨a£© prehistoric desert people.
¡¡¡¡£¨b£© migratory animals.
¡¡¡¡£¨c£© food supplies and tools.
¡¡¡¡£¨d£© growing plants.
¡¡¡¡46.
¡¡¡¡£¨a£© to illustrate the size of some objects.
¡¡¡¡£¨b£© to introduce the next assignment.
¡¡¡¡£¨c£© to show some artifacts on display at the campus museum.
¡¡¡¡£¨d£© to demonstrate his photographic ability.
¡¡¡¡47.
¡¡¡¡£¨a£© a comparison of fish to warm-blooded animals.
¡¡¡¡£¨b£© the difference between saltwater and freshwater environments.
¡¡¡¡£¨c£© the importance of fish to human beings.
¡¡¡¡£¨d£© how water has affected the development of fish.
¡¡¡¡48.
¡¡¡¡£¨a£© it can' t be compressed.
¡¡¡¡£¨b£© it is often polluted.
¡¡¡¡£¨c£© its temperature often fluctuates dramatically.
¡¡¡¡£¨d£© it limits their size.
¡¡¡¡49.
¡¡¡¡£¨a£© a whale.
¡¡¡¡£¨b£© a human.
¡¡¡¡£¨c£© a snake.
¡¡¡¡£¨d£© a snail.
¡¡¡¡50.
¡¡¡¡£¨a£© its skeleton.
¡¡¡¡£¨b£© its shape.
¡¡¡¡£¨c£© its senses.
¡¡¡¡£¨d£© its body temperature.
