综合写作：阅读文本听力原文

综合写作：阅读文本听力原文内容摘要：

efinitely worth the money we put in. Third, the MedWatch mentioned in the passage is of course a good thing. But, it is far from enough to accumulate firsthand details. Because, you know, the MedWatch system is not mandatory. I mean, it is pletely based on voluntary information feedback of doctors. And sometimes, those doctors can be too overworked or too overbooked to write down concrete and specific records we need. 2020年 11 月 19日 While many animals regularly move from place to place—including certain butterflies, bats, sea turtles, fish, and, whales—birds seem to catch most of our interest. Several theories have been raised trying to explain birds’ navigation, that is, how do birds find their way? The first theory holds that birds are guided by the sun in daytime and stars at night. Many of us have succeeded in locating the way back home through the guidance of the sun and stars when lost in the wild field. As a matter of fact, using heavenly bodies as indicators for direction was once the most widely applied surviving tact for our ancestors. The second theory is called “sighting theory”, which believes the fact that birds can always find the correct way is due to a special memory field in their brain. When traveling long distance from one place to another, birds memorize major terrain features such as rivers, coastlines and mountain ranges and then rely on these memories to find the way back home. The third theory believes that birds are rather sensitive to the earth’s magic fields. In addition, researchers have succeeded in locating tiny magic mineral grains called “magite” in the very deep part of birds’ head, which further assists birds to rely on magic fields to navigate. 2020年 10月 22日 It used to be the case that at most universities only a few students received the highest grades. But professors today routinely give a majority of their students grade that looks far beyond their real performance. This is sometimes known as “grade inflation”. Although this practice has its critics, it seems virtually irreversible. Actually, grade inflation has bee a brick in the building of general social expectations and it can no more be changed at this point for quite a few reasons. First, since most students today are getting accustomed to receiving higher grades, they have taken the fact of receiving big scores as granted. Therefore, once professors start to grade strictly, some students may be frustrated by the scores lower than expected and then lose interest in their further academic pursuits. Second, professors have the concern that once they stop granting inflated scores to less qualified students, there is a good chance that they may also receive lower evaluations from those students as a result. Usually, students’ evaluation matters a lot in determining if a professor will get a promotion or simply keep his position in the future. Third, high marks help students sell in the job market, because employers generally believe that good scores stand for h。