下列资质许可由省级建设主管部门实施的是（）。 A.交通专业承包序列一级资质 B.机电

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 (71) choices.
Now I do not think software (72) have less inherent courage and firmness than chefs, nor than other engineering managers. But false (73) to match the patron’s desired date is much more common in our discipline than elsewhere in engineering. It is very (74) 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 (75) 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. easyB. difficultC. simpleD. painless

有一群猴子，分一堆桃子，第一只猴子分了4个桃子和剩下桃子的1/10，第二只猴子分了8个桃子和这时剩下桃子的1/10，第三只猴子分了12个桃子和这时剩下桃子的1/10…依此类推．最后发现这堆桃子正好分完，且每只猴子分得的桃子同样多．那么这群猴子有多少只？

下列根据实验操作和现象所得出的结论正确的是（  ）

选项	实验操作	实验现象	结论
A	测定等浓度的Na2CO3和Na2SO3 溶液的pH	前者pH比后者的大	非金属性：S＞C
B	SO2通入酸性高锰酸钾溶液	高锰酸钾溶液褪色	SO2具有漂白性
C	向某溶液中滴加稀NaOH溶液，将湿润红色石蕊试纸置于试管口	试纸不变蓝	原溶液中无
D	向等浓度的KCl、KI混合液中滴加AgNO3溶液	先出现黄色沉淀	Ksp(AgCl)> Ksp(AgI)

（）是指在数据电文中，以电子形式所含、所附或逻辑上与数据电文有联系的数据，和与数据电文有关系的任何方法，它可用于鉴别与数据电文有关的签字持有人和表明此人认可数据电文所含信息。

A.电子签名

B.电子合同

C.数字认证

D.数字证明

防腐涂料的辅助成膜物质包括（）等几部分。

A．催干剂

B．溶剂

C．增塑剂

D．合成树脂