参考答案:A
[解析] 资源优化的目的是通过改变工作的开始时间和完成时间，使资源按照时间的分布符合优化目标。费用优化是指寻求工程总成本最低时的工期安排。工期优化是满足要求工期目标的过程。
第2题: [多项选择]北京奥运会的成功举办对中国的影响
2．奥运会后中国的发展尤其是外国人来华旅游热的发展
3．分析来华旅游热发展的原因
Foreign Travelers in China Will Increase after Beijing Olympic Games
参考答案:[写作点拨]
议论文[考频：D]①审题及布局。这篇文章是对于奥运会后所带来的热点话题提出自己的认识和分析。首先陈述成功的举办一届奥运会对于一个国家的影响，即普遍性的影响；然后切入本篇所要讨论并且很快会展现出来的对于旅游业的直接推动，即特殊性的影响；最后总结其原因。在布局上，根据题目中给出的提纲来展开即可。第一段介绍成功举办奥运会所带来的影响；第二段阐述其对于推动来华旅游业的直接而迅速发展的影响；第三段分析来华旅游业升温的原因。②语言。本文是一篇论说文，论述要重点突出，层次分明，具有说服力，词汇选择要精确，句式丰富一些。时态上选择一般现在时即可。
[写作模板]
Beijing Olympic Games has got big success. ______.
______. And also promoted by Beijing Olympic Games, China will keep on developing in every aspect as well in the past few years, especially in foreign-related tourism. ______ .
The reason is obvious. For one thing, ______. For another, ______. Last but not least, ______.
[范文]
Foreign Travelers in China Will Increase after Beijing Olympic Games
Beijing Olympic Games has got big success. Obviously this big success will give China a big opportunity to develop faster. The Olympic Games unfold a new China to the world, it is opened the mysterious veil to some people who don’t know it.
Most of foreigners realize a modern and flourish China. And also promoted by Beijing Olympic Games, China will keep on developing in every aspect as well in the past few years, especially in foreign-related tourism The number of the foreigners traveling to China, including more people from more country, compared with mainly including Americans, Japanese and Korean in the past, will increase largely,
The reason is obvious. For one thing, It is the open door policy last many years that brought about the prosperity in tourism, and this is the most important and traditional policy over the past B0 years since reform and opening-op. For another, now going with the Beijing Olympic Games’ success, the strong, rich and happy China is known by whole world: the clean street, the Chinese smile, the passion of Chinese and so on. More and more foreigners take interest in China’s development and its traditional culture. Last but not least. it’s no doubt that the government will continue to adopt a series of new policies to encourage more travelers to visit China.
第3题:[简答题]在低压电网中，为什么多采用四芯电缆？
参考答案:低压电网中多采用四芯电缆原因如下:
1)低压电网多采用三相四线制，四芯电缆的中性线除作为保护接地外，还可通过三相不平衡电流。
2)在三相四线系统中，若采用三芯电缆则不允许另外加一根导线作为中心线的敷设方法，因为这样会使三芯电缆铠装发热，从而降低了电缆的载流能力，所以多采用四芯电缆。
第4题:[单选题]在进行高压开关柜工频交流耐压试验时，当电源电压增加，电流（）时，说明将要发生电流谐振。
A.增加
B.减少
C.剧增
D.不变
参考答案:B
第5题: [多项选择]What are three examples of dynamic IGPs?（）
A. OSPF
B. BGP
C. IS-IS
D. PIM
E. RIP
参考答案:A,C,E
第6题: [单项选择]食品生产经营人员销售直接入口食品时，必须使用（）。
A. 手套
B. 塑料袋
C. 夹子
D. 售货工具
参考答案:D
第7题: [单项选择]有抗震设防要求的框架柱截面宽度不宜小于多少
A. 250mm
B. 300mm
C. 400mm
D. 500mm
参考答案:B
答案解析:[解析] 根据《高规》第6.4.1-1条的规定，有抗震设防要求的框架柱截面宽度不宜小于300mm。
第8题: [单项选择]在俄国亚历山大三世血腥统治的黑暗时代，悲观主义的思想、情绪强烈地影响着俄国的知识分子，柴可夫斯基的（）作品就是受其影响的。
A. 《第六悲怆交响曲》
B. 《田园》
C. 《英雄》
D. 《合唱》
参考答案:A
答案解析:《第六悲怆交响曲》描写的是人生的恐怖、绝望、失败、灭亡等，否定了一切乐观情绪。
第9题: [单项选择]现有定义int a; double b; float c; char k; ，则表达式a/b+c-k值的类型为（）
A. int
B. double
C. float
D. char
参考答案:B
答案解析:
[解析] 双目运算中两边运算量类型转换规律：
| 男性，70岁。10年来患高血压病，2小时前因有不顺心的事，血压突然升高达 200/120mmHg，呼吸困难不能平卧，发生急性左心衰竭来诊。 |
催化tRNA携带氨基酸的酶是氨基酰-tRNA合成酶。
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