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将某IT企业1995～2006年的销售收入、科技支出和设备数量分别代入回归方程，得到企业1995～2006年的专业技术人员的预测人数，与实际人数进行对比，对比结果见表2-1-2和图2-1-3，请说明其是否合理。

表2-1-2 1995～2006年企业专业技术人员实际值与预测值比较 (单位：人)
年份199519961997199819992000200120022003200420052006
预测值313318313326322315361368438425502542
实际值304304323300332377409462445517565591

答案

参考答案：

由图2-1-3可以直观地看出，企业专业技术人员预测值的变化趋势基本反映了实际值的变化趋势。由此可以判断，我们所建立的回归模型用来预测企业专业技术人员的偏差率比较低，可靠度较高，是合理的。

填空题

Part 4


Questions 26-45


·Read the following passage and choose the best word for each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.
During the past ten years (26) attention has been given to "telling it like it is". My impression is that this devotion to (27) one’s mind has more often led to hurt feelings and ruined relationships than (28) great joy.
I think we generally agree that never expressing real feelings and (29) all less-than-lovely thoughts about each other always leads to constructive communication. It’s a great (30) to allow ourselves to admit our human weaknesses and pursue more honest relationships with others. (31) we need to keep a balance between telling it all and telling nothing.
Recently I received a letter from a mother who had been (32) by her son to attend a weekend meeting with him. Under pressure from the group, her defenses cracked and she heard herself (33) her son for the first time that he (34) an accident—that she hadn’t been planning to have a child. He (35) told her that he couldn’t recall a single day in his childhood that he’d been happy. We cried and (36) ; I thought telling the truth had been good for us. But the trouble is, it wasn’t the whole truth. By the time Tommy was born I did want him, and at (37) he was happy. Ever since that day, we (38) . by some terrible feelings we exchanged. I must admit I’ve (39) the conclusion that some things are better left uncovered. Honesty is a fine policy, but we need a new sense of (40) . Disclosing is not a solution to every problem (41) even an end in itself. It’s useful under some circumstances and terribly hurtful under (42) . It’s a good idea, I think, to bite your (43) for ten or fifteen minutes before saying what’s (44) your mind. Try to decide whether it’s going to open up new and better ways of communication or (45) wounds that may never heal.

A．come to

B．arrived

C．reached at

D．gone to
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单项选择题

目前，中央企业82．8%的资产集中在石油石化、电力、国防、通信、运输、矿业、冶金、机械等行业，承担着我国几乎全部的原油、天然气和乙烯生产，提供了全部的基础电信服务和大部分增值业务。在重要行业和关键领域的中央企业户数占全部中央企业的25%，资产总额占75%，实现利税占到80%。上述材料表明（）

①国有经济是国民经济的主导力量

②国有经济掌握着国家的经济命脉

③国有经济是我国国民经济的基础

④国有资产在社会总资产中占优势

A、①②

B、③④

C、①③

D、②④
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