生态学成为一门独立的学科的原因是由于（ ）

【名词&注释】

马尔萨斯(thomas robert malthus)、艺术品(work of art)、清洁工(porter)、人口论(population theory)、《生态学》、“生存竞争”

[单选题]生态学成为一门独立的学科的原因是由于（ ）

A. 它与其他学科的交叉
B. 它研究内容的广泛和深入
C. 它的理论逐渐形成
D. 以上全部内容

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学习资料：

[单选题]下列加点虚词用法相同的两项是 （ ）①乃召绰，告之以事，绰即为量定

A. ②惠达以绰对，因称其有王佐才 ③以海内未平
B. ④遂留绰至夜，问以政道
C. ①②
D. ③④
E. ②④
F. ①③

[单选题]Passage FiveIn the United States, it is important to be on time, or punctual, for an appointment, a class, etc. However, this may not be true in all countries. An American professor discovered this difference while teaching a class in a Brazilian (巴西的) university. The two-hour class was scheduled' to begin at 10

A. M. and end at 12. On the first day, when the professor arrived on time, no one was in the classroom. Many students came after the scheduled time. Several arrived half an hour later. Few apologized for their lateness. Were these students being rude? He decided to study the students, behavior.
B. The professor talked to American and Brazilian students about lateness in both an informal and a formal situation: at a lunch with a friend and in a university class. He found that if they had a lunch appointment with a friend, the average American student defined lateness as 19 minutes after the agreed time. However, the average Brazilian student felt the friend was late after 33 minutes.
C. In an American university, classes not only begin at the scheduled time in the United States, but also end at the scheduled time. In the Brazilian class, only a few students left the class at 12: 00; many remained past 12: 30 to discuss the class and ask more questions. While arriving late may not be very important in Brazil, neither is staying late.
D. 51. The word "punctual' most probably means______.
E. leaving soon after class
F. coming early
G. arriving a few minutes late
H. being on time

[单选题]Cleaners and farmers do ______scientists do.

A. the same work as
B. less important work than
C. more work than
D. as important work as

[单选题]1798年马尔萨斯出版的一部对“生存竞争”和“物种形成”理论有重要影响的书是（ ）

A. 《人口论》
B. 《物种起源》
C. 《植物生态学》
D. 《生态学》

[单选题]绘画中的画布、画笔、水墨在艺术品的层次结构中属于_________ ( )

A. 物质实在层
B. 形式符号层
C. 意象世界层
D. 意境超验层

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