[单项选择]Economic development should go hand in hand with environmental protection（）
A. 经济的发展必须以保护环境为前提。
B. 经济的发展应与保护环境一起进行。
C. 经济发展应与环境保护齐头并进。
D. 经济的发展与保护环境应互相参考。

[单项选择]Economic development should go hand in hand with environmental protection（）
A. 经济的发展必须以保护环境为前提。
B. 经济的发展应与保护环境一起进行。
C. 经济发展应与环境保护齐头并进。
D. 经济的发展与保护环境应互相参考。

[单项选择]The economic development of Yugoslavia is directly hindered by ______.


A. the competition among its republics
B. the conflicts between the ethnic groups
C. the absence of a large modernized port
D. the existence of four distinct languages

[单项选择]If it rains, we should not go out, but the sky ______ perfectly clear.

[单项选择]If it rains, we should not go out, but the sky（）perfectly clear.
A. is
B. will be
C. was
D. had been

[单项选择]What gate should the woman go to
A. 10
B. 25
C. 30
D. 40

[单项选择]

It should go without saying that the focus of UML is modeling. However, what that means, exactly, can be an open-ended question. (101) is a means to capture ideas, relationships, decisions, and requirements in a well-defined notation that can be applied to many different domains. Modeling not only means different things to different people, but also it can use different pieces of UML depending on what you are trying to convey. In general, a UML model is made up of one or more (102) . A diagram graphically represents things, and the relationships between these things. These (103) can be representations of real-world objects, pure software constructs, or a description of the behavior of some other objects. It is common for an individual thing to show up on multiple diagrams; each diagram represents a particular interest, or view, of the thing being modeled. UML 2.0 divides diagrams into two categories: structural diagrams and behavioral diagrams. (104)
A. Activity diagrams
B. Use-case diagrams
C. Structural diagrams
D. Behavioral diagrams