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问题 单项选择题 A1/A2型题

睾丸大小正常，鞘膜腔内见无回声暗区包绕睾丸，应诊断为（）

A.睾丸鞘膜腔积液

B.精索鞘膜积液

C.隐睾

D.腹股沟斜疝

E.睾丸血肿

答案

参考答案：A

解析：睾丸鞘膜腔积液的超声表现为液体三面包绕睾丸周围。

单项选择题

下面有关数据库表和自由表的叙述中，错误的是______。

A．数据库表和自由表都可以用表设计器来建立
B．数据库表和自由表都支持表间联系和参照完整性
C．自由表可以添加到数据库中成为数据库表
D．数据库表可以从数据库中移出成为自由表
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单项选择题

The analysis phase answers the questions of who will use the system，what the system will do，and where and when it will be used．During this phase，the project team investigates any current system，identifies (71) ，and develops a concept for the new system．This phase has three steps：first， (72) is developed to guide the project team’s efforts．It usually includes an analysis of the current system and its problems，and the ways to design a new system．The next step is (73) ．The analysis of this information-in conjunction with input from the project sponsor and many other people-leads to the development of a concept for a new system．The system concept is then used as a basis to develop a set of business analysis models that describes how the business will operate if the new system were developed．The set of models typically includes models that represent the (74) necessary to suppor the underlying business process．Last，the analyses，system concepts，and models are combinedin to a document called the (75) ，which is presented to the project sponsor and other key decision makers that decide whether the project should continue to move forward．

A．a user manual
B．an analysis strategy
C．an analysis use case
D．a design user case
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