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问题 单项选择题 A1/A2型题

蚕豆病的病因是（）。

A.机体对蚕豆中的蛋白质过敏

B.红细胞内缺乏葡萄糖6-磷酸脱氢酶

C.体内缺乏葡萄糖-6-磷酸酶

D.体内缺乏谷胱甘肽过氧化物酶

E.红细胞中缺少加单氧酶

答案

参考答案：B

解析：蚕豆病是葡萄糖-6-磷酸脱氢酶（G6PD）缺乏者进食蚕豆后发生的急性溶血性贫血。蚕豆（viciafaba）又名胡豆黄。

单项选择题

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (6) of the technical requirements for the software product.

During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each (7) that it must meet. The starting point is usually a set of high-level requirements from the (8) that describe the project or problem.

In either case, the requirements definition team formulates an overall concept for the system and then defines (9) showing how the system will be operated, publishes the system and operations concept document, and conducts a system concept review (SCR).

Following the SCR, the team derives (10) requirements for the system from the high level requirements and the system and operations concept. Using structured or object-oriented analysis the team specifies the software functions and algorithms needed to, satisfy each detailed requirement.

10（）

A.detailed 

B.outlined 

C.total 

D.complete
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单项选择题

编一本书的书页，用了270个数字（重复的也算，如页码115用了2个1和1个5，共3个数字），问这本书一共有多少页？（）

A.117

B.126

C.127

D.189
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