单项选择题 SECTION B PASSAGESDirections: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.听力原文： It is common knowledge that music can have a powerful effect on our emotions. In fact, since the 1930s, music therapists have relied on music to soothe patients and help control pain. Now psychologists are confirming that music can also help relieve depression and improve concentration. For instance, in a recent study, 15 surgeons were given some highly stressed math problems to solve. They were divided into three groups: one group worked in silence, and in another, the surgeons listened to music of their choice on headphones; the third group listened to classic music chosen by the researchers. The results of the study may surprise you. The doctors who got to choose their own music experienced less stress and scored better than the others. One possible explanation is that listening to music you like stimulates Alfa-waves in the brain, increases the heart rate and expands the breathing. That helps to reduce stress and sharpen concentration. Other research suggests a second relationship between music and the brain: by examining the students' blood after they listening to a variety of classic music collections, researchers found that some students showed a large increase in endorphin, a natural pain reliever, this supports what music therapists have known for years: Music can help rejuvenate or soothe the patient.What is the talk mainly about?A．Training given to music therapists.B．How music prevents disease.C．Studies on the benefits of music.D．How musicians create music.

单项选择题 董事会应根据公司（）情况确定自营业务规模、可承受的风险限额等，并以董事会决议的形式进行落实。Ⅰ.损益Ⅱ.资本充足Ⅲ.负债

单项选择题 听力原文： Human population near the equator have evolved dark skin over many generations because of exposure to the fiercest rays of the sun. A similar phenomenon has also occurred in other parts of the animal kingdom. The African grass mouse is a good example. Most mice are nocturnal, but the African grass mouse is active during daylight hours. This means that it spends its days searching for food in the semi-dry bush in squired habitats of eastern and southern Africa. Its furry stripe's like a chipmunk's, which helps it blend in with its environment. Because it spends a lot of time in the intense tropical sun, the grass mouse has also evolved two separate safeguards against the sun's ultraviolet radiation. First, like the population of humans in this region of the world, the skin of the grass mouse contains lots of melanin, or dark pigment. Second and quite unusual, this mouse has a layer of melanin pigmented tissue between its skull and skin. This unique cap provides an extra measure of protection for the grass mouse and three other types of African mouse, like rodents that are active during the day. The only other specie scientists have identified with the same sort of skull adaptation is the white tent-making hat of the Central American tropics. Although these bats sleep during the day, they do so curled up with their head exposed to the sun.What is the speaker mainly discussing?A．The adaptations of the African grass mouse to its environment.B．The sleeping habits of the African grass mouse.C．The effect of intense sunlight on the diet of the African grass mouse.D．The habitat of the African grass mouse.