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问题 单项选择题

在用例之间会有不同的关系，下列（）不是它们之间可能的关系。

A.包含（includE）

B.扩展（extenD）

C.泛化（generalization）

D.关联（connect）

答案

参考答案：D

单项选择题

Colleges in the US have added a new subject, “great chemistry”, to their curriculum today. “Green chemistry (53) how we can develop products that won’t (54) the environment,” explains Paul Anastas, director of Yale University’s Center for Green Chemistry and Green Engineering, opened at the beginning of this year. The American Chemical Society, (55) approves more than 600 college chemistry programs, only lists about a dozen that teach green chemistry. But that (56) is growing.
Cambridge College in Massachusetts is offering “ an introduction to green chemistry” course this gall and is offering the nation’s first bachelor’s and master’s (57) in green chemistry. The program will have classes in environmental science and even environmental (58) and policy. These subjects are not (59) taught to chemistry major.
Employers (60) the introduction of green chemistry. Businesses are increasing seeking graduates (61) backgrounds in the subject because it can help them make or save money in he development and manufacturing of products. “We need people who can not only understand their place (62) , but also understand the worldwide perspective,” said Adam Peterson, a chemical division manager at Dow Corning Corp.

A．in a row
B．in person
C．in common
D．in a chain
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单项选择题

1990年，2003年1季度，我国外汇储备呈现出（）

A．快速减少与平缓减少并行

B．逐步上升，并且上升幅度较大

C．升中有降，降中有升

D．上升和下降交替出现
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