单选题Peter"s job was to examine cars when they crossed the frontier to make sure that they were not smuggling anything into the country. Every evening he would see a factory worker coming 1 the hill towards the frontier, 2 a bike with a pile of goods of old straw on it. When the bike 3 the frontier, Peter would stop the man and 4 him take the straw off and untie it. Then he would examine the straw very 5 to see 6 he could find anything, after which he would look in all the man"s pockets 7 he let him tie the straw again. The man would then put it on his bike and go off down the hill with it. Although Peter was always 8 to find gold or other valuable things 9 in the straw, he never found 10 . He was sure the man was 11 something, but he was not 12 to think out what it could be. Then one evening, after he had looked 13 the straw and emptied the worker"s pockets 14 usual, he 15 to him, "Listen, I know you are smuggling things 16 this frontier. Won"t you tell me what it is? I"m an old man, and today"s my last day on the 17 . Tomorrow I"m going to 18 . I promise I shall not tell 19 if you tell me what you"ve been smuggling." The worker did not say anything for 20 . Then he smiled, turned to Peter and said quietly, "Bikes."

单选题(73) In its early history, Chicago had floods frequently, especially in the spring, making the streets so muddy that people, horses, and carts got stuck. An old joke that was popular at the time went something like this: A man is stuck up to his waist in a muddy Chicago street. Asked if he needs help, he replies, " No, thanks. I' ve got a good horse under me. " The city planner decided to build an underground drainage(排水)system, but there simply wasn' t enough difference between the height of the ground level and the water level. The only two options were to lower the Chicago River or raise the city. An engineer named Ellis Chesbrough convinced the city that it had no choice but to build the pipes above ground and then cover them with dirt. This raised the level of the city' s streets by as much as 12 feet. This of course created a new problem: dirt practically buried the first floors of every building in Chicago. Building owners were faced with a choice: either change the first floors of their buildings into basements, and the second stories into main floors, or hoist the entire buildings to meet the new street level. Small wood-frame buildings could be lifted fairly easily. But what about large, heavy structures like the Tremont Hotel, which was a six-story brick building? That' s where George Pullman came in. He had developed some house-moving skills successfully. To lift a big structure like the Tremont Hotel, Pullman would place thousands of jackscrews(螺旋千斤顶)beneath the building's foundat ion. One man was assigned to operate each section of roughly 10 jackscrews. At Pullman' s signal each man turned his jackscrew the same amount at the same time, thereby raising the building slowly and evenly. Astonishingly, the Tremont Hotel stayed open during the entire operation, and many of its guests didn' t even notice anything was happening. Some people like to say that every problem has a solution. But in Chicago' s early history, every engineering solution seemed to create a new problem. Now that Chicago' s waste water was draining efficiently into the Chicago River, the city's next step was to clean the polluted river.

单选题实施控制关键性的步骤是 ( )

单选题函数是______

单选题现场控制是由于管理者具有有限的理性，以及变化莫测的环境对前馈控制的一种补充形式，下列哪项与之不符______

单选题下列作家中主要以知青生活和残疾人命运心态为创作题材的是 ( )

单选题《断魂枪》开头的社会环境描写，对后文人物性格展现的主要作用是( )

单选题Word义档可以用Windows附件中的“记事本”打开。 ( )

单选题迷走神经和交感神经对下列哪种消化腺分泌均具有促进作用( )

单选题The custom of males wearing skirts is_________ to Scotland.

单选题与十六进制数AD等值的十进制数是______

单选题胃癌的最主要转移途径是( )

单选题[此试题无题干]

单选题下列哪个格式可以将数据单位定义为“万元”，且带两位小数 ( )

单选题当x→0时，下列无穷小量中与x等价的是______A．2x2-xB．C．ln(1+x)D．sin2x

单选题李商隐《无题》(相见时难别亦难)中运用了比兴手法的一联是( )

单选题在动物中脑上、下丘之间切断脑干，可出现______

单选题Do you mind if I______with my work while you are getting tea ready?

单选题多数可兴奋组织产生兴奋的共同标志是( )

单选题The new type of machine ______ the year after next.