For vessels with _____, the meaning of the order would include the combination of pitch an

SECTION B PASSAGES

Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.

听力原文： Canals are watercourses constructed to improve and extend natural waterways. They are generally built to facilitate transportation, but from the beginning they have been used for many additional purposes including draining swamps, irrigating land for cultivation, and promoting economic development.

Canals are often classified by the size of vessel they can accommodate. Some small local canals, which are able to float only 100 to 300 ton boats or small rafts of timber, may be only 3 feet deep. Major barge canals generally range from 6 to 9 feet in depth, and some are as much as 10 or 12 feet deep. These canals can carry 1,350 to 2,000 ton craft. Ship canals are 25 feet or more deep and are capable of accommodating large vessels in the seagoing class.

Canals may also be classified as either water level or lock canals. Water level canals do not vary in height a- long their courses. The best known of these is the Suez Canal, which is at sea level. Lock canals, which include most modern waterways, contain locks, or special devices for raising and lowering boats along their courses by changing the depth of the water. Each lock is a stretch of water enclosed by gates at each end. After a boat enters the lock, water is let or drained out until it reaches approximately the same level as the water ahead.

What does the passage mainly discuss？

A．How canals are constructed.

B．Common types of canal boats and barges.

C．The world's largest canals.

D．How canals are used and classified.

SECTION B PASSAGES

Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.

听力原文： Canals are watercourses constructed to improve and extend natural waterways. They are generally built to facilitate transportation, but from the beginning they have been used for many additional purposes including draining swamps, irrigating land for cultivation, and promoting economic development.

Canals are often classified by the size of vessel they can accommodate. Some small local canals, which are able to float only 100 to 300 ton boats or small rafts of timber, may be only 3 feet deep. Major barge canals generally range from 6 to 9 feet in depth, and some are as much as 10 or 12 feet deep. These canals can carry 1,350 to 2,000 ton craft. Ship canals are 25 feet or more deep and are capable of accommodating large vessels in the seagoing class.

Canals may also be classified as either water level or lock canals. Water level canals do not vary in height along their courses. The best known of these is the Suez Canal, which is at sea level. Lock canals, which include most modern waterways, contain locks, or special devices for raising and lowering boats along their courses by changing the depth of the water. Each lock is a stretch of water enclosed by gates at each end. After a boat enters the lock, water is let or drained out until it reaches approximately the same level as the water ahead.

What does the passage mainly discuss？

A．How canals are constructed.

B．Common types of canal boats and barges.

C．The world's largest canals.

D．How canals are used and classified.

根据以下材料，回答题

Smart Exercise

Doctors are starting to find more and more information that suggests a connection between exercise and brain development. Judy Cameron， a scientist at Oregon Health and Science University， studies brain development. According to her research， it seems that exercise can make blood vessels， including those in the brain， stronger and more fully developed. Dr.

Cameron claims this allows people who exercise to concentrate better. As she says: "While we already know that exercise is good for the heart， exercise can literally cause physical changes in the brain."

The effects of exercise on brain development can even be seen in babies. Babies who do activities that require a lot of movement and physical activity show greater brain development than babies who are less physically active. With babies， even a little movement can show big results. Margaret Barnes， a pediatrician （儿科医师） ， believes in the importance of exercise.

She thinks that many learning disabilities that children have in elementary school or high school can be traced back to a lack of movement as babies. "Babies need movement that stimulates their five senses. They need to establish a connection between motion and memory.

In this way， as they get older， children will begin to associate physical activity with higher learning，" says Margaret.

Older people can beef up their brains as well. Cornell University studied a group of seniors ranging in age from seventy to seventy-nine. Their study showed a short-term memory increase of up to 40 percent after exercising just three hours a week. The exercise does not have to be very difficult， but it does have to increase the heart rate. Also， just like the motion for infants， exercise for older people should involve some complexity. Learning some new skills or motions helps to open up memory paths in the brain that may not have been used for a long time.

For most people， any type of physical activity that increases the heart rate is helpful. The main goal is to increase the brain"s flow of blood. And your brain can benefit from as little as two to three hours of exercise a week.

Research by Dr. Cameron seems to suggest that exercise can __________. 查看材料

A.generate new blood vessels

B.change the way a person thinks

C.promote brain development

D.divert one"s attention

SECTION B PASSAGES

Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.

听力原文： Canals are watercourses constructed to improve and extend natural waterways. (11) They are generally built to facilitate transportation, but from the beginning they have been used for many additional purposes including draining swamps, irrigating land for cultivation, and promoting economic development.

(11) Canals are often classified by the size of vessel they can accommodate. Some small local canals, which are able to float only 100 to 300 ton boats or small rafts of timber, may be only 3 feet deep. Major barge canals generally range from 6 to 9 feet in depth, and some are as much as 10 or 12 feet deep. These canals can carry 1,350 to 2,000 ton craft. Ship canals are 25 feet or more deep and are capable of accommodating large vessels in the seagoing class.

Canals may also be classified as either water level or lock canals. (13) Water level canals do not vary in height along their courses. The best known of these is the Suez Canal, which is at sea level, Lock canals, which include most modern waterways, contain locks, or special devices for raising and lowering boats along their courses by changing the depth of the water. (12) Each lock is a stretch of water enclosed by gates at each end. After a boat enters the lock, water is let or drained out until it reaches approximately the same level as the water ahead.

What does the passage mainly discuss？

A．How canals are constructed.

B．Common types of canal boats and barges.

C．The world's largest canals.

D．How canals are used and classified.

A NVOCC usually operates vessels to provide sea transportation.( )

A．To design vessels that could make long ocean voyages.

B．To design vessels that could travel faster than those in use at that time.

C．To design vessels that could explore the coastline of Portugal.

D．To design vessels that could carry larger crews and more cargo than existing ones.

Nicotine dilates the blood vessels that carry it around the body.

A．Y

B．N

C．NG

Vessels transiting the Canal must have their gangways and derricks ________

A.readjusted

B.removed

C.lowered

D.rigged in