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　　1.According to the passage, a shark can use movement to do something except____________.

　　[A]to find food

　　[B]to avoid being chased by its enemies

　　[C]to find a new place to live

　　[D]to show its braveness

　　2.Examples of automobiles, rockets and submarines are used to show that _______________.

　　[A]humans are the most clever living creatures in the world

　　[B]human inventions enable us to travel in almost any kind of environment

　　[C]humans are very successful in inventing transportation tools

　　[D]humans can’t move like other animals in any circumstances

　　3.What is the key to the shark’s swift locomotion in water?

　　[A]The skin. [B]The tail. [C]The muscle. [D]The jaw.

　　4.According to the Duke University scientists, when does the shark stretch its collagen fibers to the greatest extent?

　　[A]When moving its tail rapidly.

　　[B]When finding its preys.

　　[C]When staying without any movement.

　　[D]When bending its body in swimming.

　　5.Why is the area just under the shark’s collagen fibers similar to a belted radial tire?

　　[A]Because it is also full of blood pressure.

　　[B]Because it is also filled of air pressure.

　　[C]Because it is also inflated by pressure.

　　[D]Because it also can be used again and again.

　　6.A laminar flow is formed when a fish swims________________.

　　[A]slowly through the water

　　[B]rapidly through the water

　　[C]against the current

　　[D]at the fastest speed in water

　　7.Consuming the equal amount of energy as a slug does, a mouse can travel _________ as long as a slug.

　　[A]one twelfth times

　　[B]the same

　　[C]12 times

　　[D]1.2 times

　　8.A shark finds its prey by________________.

　　9.According to the passage, _______________can be compared to the string of a bow for both of them store energy when stretched.

　　10.When the shark detects an important food source, _______________________take place.

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