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问题 选择题

雌蚕蛾能释放一种性引诱剂，可以把3km以外的雄蚕蛾吸引过来。虽然每只雌蚕蛾所释放的性引诱剂的数量不足0.01mg，但雄蚕蛾仍能对其作出反应。有趣的是雄蚕蛾对密封在玻璃瓶中的雌蚕蛾虽然看得见，但却无动于衷。下列相关叙述错误的是[ ]

A．使雄蚕蛾作出反应的性引诱剂属于化学信息

B．体现了信息的传递有益于种群的繁衍

C．说明生态系统中的信息都是由生物产生的

D．说明性引诱剂具有高效性

答案

答案：C

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. But when it has not set in two minutes, the customer has two choices-waits or eats it raw. Software customers have had __(1)__ choices. Now I do not think software __(2)__ have less inherent courage and firmness than chefs,nor than other engineering managers. But false __(3)__to match the patron's desired date is much more common in our discipline than elsewhere in engineering. It is very __(4)__ 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__(5)__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.

空白（5）处应选择（）

A.sharing 

B.excluding 

C.omitting 

D.ignoring
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单项选择题

关于SLE遗传基因的叙述，错误的说法是（）

A.SLE是单基因疾病

B.特定的自身抗体常与SLE的临床亚型有关

C.基因间在某种环境下相互作用，改变了正常免疫耐受性而致病

D.HLA的补体基因与SLE的发病相关

E.HLA-Ⅱ类基因位点所共有的特定序列与SLE病人中许多自身抗体的产生有关
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