[单项选择]Why were there few jurisdictional disputes over international waters until the mid-twentieth century


A. No nation had the right to regulate coastal activities for innocent purposes.
B. All nations shared equal right and responsibility for international waters.
C. Few standards of conduct could be applied to activities in international waters.
D. Most nations did not establish rules for management or protection of their territorial waters.

[单项选择]Why were there few jurisdictional disputes over international waters until the mid-twentieth century


A. No nation had the right to regulate coastal activities for innocent purposes.
B. All nations shared equal right and responsibility for international waters.
C. Few standards of conduct could be applied to activities in international waters.
D. Most nations did not establish rules for management or protection of their territorial waters.

[单项选择]The reason why few airlines want to impose a total ban on their passengers using electronic devices is ______.

[单项选择]The professor said there were a few points in the paper he______prone to plagiarize.
A. was finding
B. has found
C. had found
D. would find

[单项选择]The student said there were a few points in the essay he ______ impossible to comprehend.
A. had found
B. finds
C. has found
D. would find

[单项选择]

Text 4
Over the past few decades, there has been a considerable increase in the use of mathematical analysis, both for solving everyday problems and for theoretical developments of many disciplines. For example, economics, biology, geography and medicine have all seen a considerable increase in the use of quantitative techniques. Twenty years ago applied mathematics meant the application of mathematics to problems in mechanics and little else--now, applied mathematics, or as many people prefer to call it, applicable mathematics, could refer to the use of mathematics in many varied areas. The one unifying theme that these applications have is that of mathematical modeling, by which we mean the construction of a mathematical model to describe the situation under study. This process of changing a real life problem into a mathematical one is not at all easy, we hasten to add, although one of the overall aims of this book is to improve your ability as a mathematical mod
A. to become a good mathematical modeler
B. to tackle as many mathematical problems as possible
C. to do the problems given in the book on one's own
D. to have confidence in constructing mathematical models

[单项选择]Why do only few pilots retire early


A. Because pilots are much needed in the airline industry.
B. Because the economy is gloomy.
C. Because the cost of training a pilot is high.
D. Because pilots can not do other jobs.

[单项选择]Why were the documents released


A. To improve the relationship with Russia.
B. To urge Clinton not to end the trade restriction.
C. To prove that many soldiers are still missing.
D. To provide more information about North Vietnam.

[单项选择]Why were the hostages held

[单项选择]Why were the couple frustrated


A. Their dog was not feeling very well.
B. They were trying to sell their house but failed.
C. Their financial position was not on the right track.
D. They had bank loan to pay off.

[单项选择]Why were the couple detained


A. Because of gem theft.
B. Because of robbery.
C. Because they are spy.
D. Because of money cheating.