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问题 单项选择题 A1/A2型题

原发性血小板减少性紫癜，PAIgG、PAIgA、PAIgM和PAC3的水平均可升高，其中常见的是（）.

A.PAIgG

B.PAIgA

C.PAIgM

D.PAC3

E.循环免疫复合物CIC

答案

参考答案：A

单项选择题

慢性风湿性瓣膜病中联合瓣膜病变常发生于

A．二尖瓣和三尖瓣
B．二尖瓣和主动脉瓣
C．三尖瓣和主动脉瓣
D．三尖瓣和肺动脉瓣
E．主动脉瓣和肺动脉瓣
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单项选择题

Observe that for the programmer, as for the chef, the urgency of the patron (顾客) may govern the scheduled completion of the task, but it cannot govern the actual completion. An omelette (煎鸡蛋) , promised in two minutes, may appear to be progressing nicely. Butwhen it has not set in two minutes, the customer has two choices--waits or eats it raw. Software customers have had (116) choices.
Now I do not think software (117) have less inherent courage and firmness thanchefs, nor than other engineering managers. But false (118) to match the patron’s desireddate is much more common in our discipline than elsewhere in engineering. It is very (119) to make a vigorous, plausible, and job risking defense of an estimate that is derived by no quantitative method, supported by little data, and certified chiefly by the hunches of the managers.
Clearly two solutions are needed. We need to develop and publicize productivity figures, bug-incidence figures, estimating rules, and so on. The whole profession can only profit from (120) such data. Until estimating is on a sounder basis, individual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.

A．Testers

B．constructors

C．managers

D．architects
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