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【单选题】
Woodrow Wilson was referring to the liberal idea of the economic market when he said that the free enterprise system is the most efficient economic system. Maximum freedom means maximum productiveness our 'openness' is to be the measure of our stability. Fascination with this ideal has made Americans defy the 'Old World' categories of settled possessiveness versus unsettling deprivation, a 'status quo' defended or attacked. The United States, it was believed, had no status quo ante. Our only 'station' was the turning of a stationary wheel, spinning faster and faster. We did not base our system on property but opportunity—which meant we based it not on stability but on mobility. The more things changed, that is, the more rapidly the wheel turned, the steadier we would be. The conventional picture of class politics is composed of the Haves, who want a stability to keep what they have, and the Have-Nots, who want a touch of instability and change in which to scramble for the things they have not. But Americans imagined a condition in which speculators, self-makers, runners are always using the new opportunities given by our land. These economic leaders (front-runners) would thus be mainly agents of change. The nonstarters were considered the ones who wanted stability, a strong referee to give them some position in the race, a regulative hand to calm manic speculation an authority that can call things to a halt, begin things again from compensatorily staggered 'starting lines.' 'Reform' in America has been sterile because it can imagine no change except through the extension of this metaphor of a race, wider inclusion of competitors, 'a piece of the action,' as it were, for the disenfranchised. There is no attempt to call off the race. Since our only stability is change, America seems not to honor the quiet work that achieves social interdependence and stability. There is, in our legends, no heroism of the office clerk, no stable industrial work force of the people who actually make the system work. There is no pride in being an employee (Wilson asked for a return to the time when everyone was an employer). There has been no boasting about our social workers--they are merely signs of the system's failure, of opportunity denied or not taken, of things to be eliminated. We have no pride in our growing interdependence, in the fact that our system can serve others, that we are able to help those in need empty boasts from the past make us ashamed of our present achievements, make us try to forget or deny them, move away from them. There is no honor but in the Wonderland race we must all run, all trying to win, none winning in the end (for there is no end). Which of the following best expresses the author's main point?
A.
The absence of a status quo ante has undermined United States economic structure.
B.
The free enterprise system has been only a useless concept in the United States.
C.
The myth of the American free enterprise system is seriously flawed.
D.
Fascination with the ideal of 'openness' has made Americans a progressive people.
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【多选题】某实验室对牧草种子进行了水分测定,并根据质量标准对送检的牧草种子 GB/T 2930.8 进行了质量分级,在这个过程中,以下说法哪个是正确的:
A.
实验室对牧草种子水分含量是多少得出实验数据,是检验;
B.
实验室根据其他实验室提供的牧草种子水分结果(带 CMA 的报告),依据 GB/T 2930.8 的要求对木牧草种子进行了质量分级,是检验
C.
实验室对牧草种子水分含量是多少得出实验数据,是检测;
D.
实验室根据其他实验室提供的牧草种子水分结果(带 CMA 的报告),依据 GB/T 2930.8 的要求对木牧草种子进行了质量分级,是检测;
【多选题】我国现行的,《农作物种子分级标准》规定的种子分级依据是( )
A.
种子纯度
B.
发芽率
C.
净度
D.
水分
【简答题】设函数 f(x)= 1- x 2 ,x≤1 x 2 +x-2,x>1 ,则f(2)=______.
【简答题】设函数f(x)=2 x ,对于任意的x 1 ,x 2 (x 1 ≠x 2 ),有下列命题 ①f(x 1 +x 2 )=f(x 1 )?f(x 2 );②f(x 1 ?x 2 )=f(x 1 )+f(x 2 );③ f( x 1 )-f( x 2 ) x 1 - x 2 >0 ;④ f( x 1 + x 2 2 )< f( x 1 )+f( x 2 ) 2 .其中正确的命题序号是 ______.
【简答题】函数 f(x)= x x+1 , g(x)= x 2 -1 x ,设F(x)=f(x)?g(x),则F(x)=______.
【单选题】种子分级的定级标准是( )
A.
净度
B.
发芽率
C.
种子水分
D.
纯度
【多选题】中国登山协会制定的《国家登山步道标准》将步道类型依据用途和难度级别分为三种,分别是( )。
A.
家庭步道
B.
山野步道
C.
探险步道
D.
亲子步道
【简答题】设g 1 (x)g 2 (x)|f 1 (x)f 2 (x)f 1 (x)|g 1 (x),f 1 (x)≠0,则g 2 (x)|f 2 (x). 设g 1 (x)g 2 (x)|f 1 (x)f 2 (x)且g 1 (x)|f 1 (x),则g 2 (x)|f 2 (x)?
【简答题】设 f(x)= x+2(x≤-1) x 2 (-1<x<2) 2x(x≥2) ,若f(x)=3,则x=______.
【单选题】下面关于WCDMA系统中天线方向角时应遵循以下原则的说法正确的是()。
A.
天线的主瓣方向指向高话务密度区,可以加强该地区信号强度,提高容量、但通话质量会有所下降
B.
市区相邻扇区天线交叉覆盖深度不宜超过15%,同基站相邻扇区天线方向夹角不宜小于90°
C.
天线方位角的设计应从整个网络的角度考虑,在满足覆盖的基础上,尽可能保证市区各基站的三扇区方位角一致,局部微调,以避免日后新增基站扩容时增加复杂性
D.
为防止越区覆盖,出现导频污染,密集市区应避免天线主瓣正对较直的街道,但正对河流、金属等无所谓
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