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问题 单项选择题

诊断感染性心内膜炎的最重要方法是

A．免疫学检查
B．心电图检查
C．X线检查
D．血培养
E．常规生化检查

答案

参考答案：D

解析：感染性心内膜炎为心脏内膜表面被微生物感染，因而其诊断的最重要方法是血培养，以找到病原菌，这也有利于治疗。

单项选择题 共用题干题

Feasibility should be measured throughout the life cycle of system development. The scope and complexity of an apparently feasible project can change after the initial problems and opportunities are fully analyzed or after the system has been designed. Thus, a project that is feasible at one point may become infeasible later. The first feasibility analysis is conducted during the (1). The (2) represents a major feasibility analysis activity since it charts one of many possible implementations as the target for systems design. (3)  is a measure of how well the solution will work in the organization. It is also a measure of how people feel about the system. When it is determined in the later stages of the system life cycle, (4)  is often performed with a working prototype of the proposed system. This is a test of the system's user interfaces and is measured in how easy they are to learn and to use and how they support the desired productivity levels of the users. Economic feasibility has been defined as a cost-benefit analysis. The (5)  technique is a simple and popular method for determining if and when an investment will pay for itself.

空白（2）处应选择（）

A.problem analysis phase

B.preliminary investigation phase

C.requirements analysis phase

D.decision analysis phase
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单项选择题

现代电子设计方法包含了可测试设计，其中 (39) 接口是IC 芯片测试的标准接口。

A．BIST

B．JTAG

C．UART

D．USB
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