分解因式：am2-2amn+an2．

“近来各省虽间有制造等局，然所造皆系军火，于民间日用之物，尚属阙如。臣愚以为华民所需外洋之物，必应悉行仿造，虽不尽断来源，亦可渐开风气。”材料表明(　　)

A．地主阶级洋务派积极创办民用工业

B．清政府大力发展近代工业

C．近代民族资本家大力发展机器工业

D．中国出现了资本主义萌芽

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

建设工程动态投资部分，是指在建设期内，因建设期利息、建设工程需缴纳的（）和国家新批准的税费、汇率、利率变动以及建设期价格变动引起的建设投资增加额。

A．基本预备费

B．涨价预备费

C．固定资产投资方向调节税

D．建筑安装工程费用

A．至少有一条

B．仅有一条

C．不一定存在

D．不存在

下列关于园林植物种植设计的说法，不正确的是（）

A.因地制宜，适地适树

B.合理布局

C.种类多样，季相变化

D.强调近期景观效果