No More Posters Outside the Student Center
Traditionally, students have been permitted to put up posters advertising events, clubs, and activities on the concrete wall outside the main entrance to the student center Beginning next semester, however, students will no longer be allowed to attach anything to the front of the building According to a university official, the new policy is part of an effort to improve the campus’s appearance. “The posters on the wall make the building unattractive," he said, "so they have to come down." He added that posters can instead be displayed in the dining hall: "Students can use the bulletin board in the dining hall for posters, so the policy change should not be a problem.
The woman expresses her opinion about the new policy. Briefly describe the policy. Then state the woman’s opinion about the policy, and explain the reasons she gives for holding that opinion.
高分词汇：attach to, unattractive, display, artistic, personality, changing.
阅读：no longer, attach, front building, posters, unattractive, dining hall.
听力：bad, square building, artistic, colorful, character, changing, not everybody, eats, dining hall.
范文：According to the university official, students will no longer be allowed to attach anything to the front of the building beginning next semester because the posters on the wall make the building unattractive and posters will be displayed in the dining hall. However, in the conversation, the girl thinks it is too bad about the new policy. Firstly, the posters there make the basic square building with gray concrete walls artistic and colorful. It also gives the building character and personality. Secondly, the stuff on the wall is always changing and it is cool. Besides, not everybody eats at the dining hall, so the posters in the dining hall is meaningless.
Many animals have defense mechanisms that help protect them from predators. In some cases, these animals have distinct coloring that signals predators of the presence of such defenses. This type of coloring is called warning coloration. If a predator does not recognize the meaning of this coloration and attacks, it may suffer significant discomfort or injury when its would-be prey employs its defense mechanism. As a result, the predator learns to associate the warning coloration with negative consequences, and will from that point forward avoid attacking animals that have that coloration.
Explain how the professor’s example from the lecture illustrates warning coloration.
高分词汇：refer to, illustrate, run from…, produce, prepare, back off, leave…alone, recall.
阅读：warning coloration, animals, signal predators, defense.
听力：skunk, white stripe, bushy tail, gland, terrible, smelling liquid, attack, spray, recall, stay far away.
范文：Warning coloration refers to a type of coloring that animals have to signal predators of the presence of defenses. In the lecture, the professor uses skunk as an example to illustrate this term. Skunks have a big white stripe that runs from the top of the head down their back and along the big bushy tail. The special glands under their tail can produce a terrible, smelling liquid. When a wolf is preparing to attack a skunk, the skunk lifts its tail and sprays the wolf. So the wolf backs off and leaves the skunk alone. From then on, whenever the wolf sees the skunk, it will recall the terrible smell and stay far away from it.