单选题向量X=(3，0，1)T是属于特征值λ=______的特征向量A．-1B．0C．1D．2

单选题已知函数那么函数y=y1+y2的振幅A的值是()。

单选题{{B}}Directions:{{/B}} There are 15 questions in this part of the test. Read the passage through. Then, go back and choose one suitable word or phrase marked A, B, C or D for each blank in the passage. Mark the corresponding letter of the word or phrase you have chosen with a single bar across the square brackets on your Machine-scoring Answer Sheet. The process by means of which human beings arbitrarily make certain things stand for other things may be called the symbolic process. Everywhere we turn, we see the symbolic process at work. There are{{U}} {{U}} 1 {{/U}} {{/U}}things men do or want to do, possess or want to possess, that have not a symbolic value. Almost all fashionable clothes are{{U}} {{U}} 2 {{/U}} {{/U}}symbolic, so is food. We{{U}} {{U}} 3 {{/U}} {{/U}}our furniture to serve{{U}} {{U}} 4 {{/U}} {{/U}}visible symbols of our taste, wealth, and social position. We often choose our houses{{U}} {{U}} 5 {{/U}} {{/U}}the basis of a feeling that it "looks well" to have a "good address". We trade perfectly good cars in for{{U}} {{U}} 6 {{/U}} {{/U}}models not always to get better transportation, but to give{{U}} {{U}} 7 {{/U}} {{/U}}to the community that we can{{U}} {{U}} 8 {{/U}} {{/U}}it. Such complicated and apparently{{U}} {{U}} 9 {{/U}} {{/U}}behavior leads philosophers to ask over and over again, "why can't human beings{{U}} {{U}} 10 {{/U}} {{/U}}simply and naturally?" Often the complexity of human life makes us look enviously at the relative{{U}} {{U}} 11 {{/U}} {{/U}}of such lives as dogs and cats. Simply, the fact that symbolic process makes complexity possible is no{{U}} {{U}} 12 {{/U}} {{/U}}for wanting to{{U}} {{U}} 13 {{/U}} {{/U}}to a cat-and-dog existence. A better solution is to understand the symbolic process{{U}} {{U}} 14 {{/U}} {{/U}}instead of being its slaves we become, to some degree at least, its{{U}} {{U}} 15 {{/U}} {{/U}}.

单选题One of the real services of the historical novel is not that it can be a substitute for history, but that it can be a(n) {{U}}extension{{/U}}. A. compliment B. supplement C. instrument D. replacement

单选题快慢两列车的长度分别为160米和120米，他们相向驶在平行的轨道上，若坐在慢车上的人看见整列快车驶过的时间是4秒，那么坐在快车上的人看见整列慢车驶过的时间是______．

单选题A．1B．0C．e2D．e6

单选题4名学生和2名教师排成一排照相，两位教师不能在两端且要相邻的排法种数为______

单选题甲、乙两项工程分别由一、二工程队负责完成．晴天时，一队完成甲工程需要12天，二队完成乙工程需要15天；雨天时，一队的工作效率是晴天时的60%，二队的工作效率是晴天时的80%．结果两队同时开工并同时完成各自的工程．那么，在这段施工期内，雨天的天数为______．

单选题，则必有______。A．B=AP1P2B．B=AP2P1C．B=P1P2AD．B＝P2P1A

单选题由数字0，1，2，3，4，5可以组成无重复数字且奇偶数字相间的六位数的个数有______

单选题计算的值为()．

单选题某商店以每件21元的价格从厂家购入一批商品，若每件商品售价为a元，则每天卖出(350-10a)件商品，但物价局限定商品出售时，商品加价不能超过进价的20%，商店计划每天从该商品出售中至少赚400元。则每件商品的售价最低应定为______元。 A．21 B．23 C．25 D．26

单选题有一个400米环形跑道，甲、乙两人同时从同一地点同方向出发．甲以0.8米/秒的速度步行，乙以2.4米/秒的速度跑步，乙在第2次追上甲时用了______秒．