[单项选择]

Today much rubber is synthetic. It would seem that there would be less opportunity for accidents in creating this artificial product. Nevertheless the first synthetic rubber was produced by accident, an even stranger accident than that which happened to Charles Goodyear. In 1917, Professor Harry L. Fisher, a teacher of organic chemistry at Columbia University, was asked by the United States War Department to prepare chemical compounds, The War Department planned to test these compounds in order to decide how effective they would be against an enemy. Fisher was given a list of 20 such compounds, and number 13 on the list was a chemical made with sulfur. Some people think that is an unlucky number, and Fisher thought it was when he first heated the chemicals in his laboratory The result was a bad - smelling, sticky substance that certainly had A. the first synthetic rubber was produced by Charles Goodyear B. if it had not been for a traffic accident, we would not have had synthetic rubber C. more need for rubber helped the development of synthetic rubber D. the first synthetic rubber came into being totally unexpectedly 查看答案 更多"Today much rubber is synthetic. It "的相关试题: [单项选择] Today much rubber is synthetic. It would seem that there would be less opportunity for accidents in creating this artificial product. Nevertheless the first synthetic rubber was produced by accident, an even stranger accident than that which happened to Charles Goodyear. In 1917, Professor Harry L. Fisher, a teacher of organic chemistry at Columbia University, was asked by the United States War Department to prepare chemical compounds, The War Department planned to test these compounds in order to decide how effective they would be against an enemy. Fisher was given a list of 20 such compounds, and number 13 on the list was a chemical made with sulfur. Some people think that is an unlucky number, and Fisher thought it was when he first heated the chemicals in his laboratory The result was a bad - smelling, sticky substance that certainly had A. help develop a chemical weapon B. prepare chemical compounds C. decide the effect of sulfur D. test a list of 20 compounds 查看答案 [单项选择]Speaker A: This room would be fine. How much is the rent Speaker B: It s, $30 a Week, or $100 a month if you agree to keep that long. On a daily basis, of course, （　）. Six dollars a night. A. It’ll be cheaper B. You don’t have to pay so much C. I’ll have to charge less D. I’ll have to charge more 查看答案 [简答题]81. In the past even as our power grew, much of the world saw us, rightly or wrongly, as a moral beacon, as a country somehow largely outside the bloody, gory, off-tyrannical history that carved its swath across so much of the world during the American Century. Indeed, in many ways, even as cultural elites in once-glorious Old World nations sneered at upstart, crass, consumerist America, the masses in those nations idealized America as some sort of Promised Land. In many ways, the American Dream of the last 100-some years has been more something dreamed by foreigners from afar, especially those who experienced fascism or Stalinism, than lived as a universal reality on the ground in the United States. 82. Things look simpler from a distance than they do on the ground. Today, I fear, foreigners slumber (酣睡) with dreamy American smiles on their sleeping faces no more; that intangible faith in the pastel-colored hue and soft contours of the Dream risks being shattered, repla 查看答案 [单项选择]______ had enough time, they would have visited the Great Wall. A. Had they B. Have they C. Would they have D. If they 查看答案 [单项选择]This is not my raincoat. ______ is much smaller than this one. A. This B. Mine C. My 查看答案 [单项选择]It would seem that Miller cannot have been on friendly terms with the gardeners there, or he would have made a （）of visiting them. A. move B. use C. point D. remedy 查看答案 [单项选择]It would seem more （　） to apply standards flexibly rather than rigidly. A. insensitive B. allergic C. sensible D. infected 查看答案 [填空题]If I (get)______up earlier, I would have caught the flight. 查看答案 [简答题] A future of temporary networks would seem to run counter to the wave of mergers sweeping the global economy. The headlines of the business press tell the story, "Compaq buys Digital"; "WorldCom buys MC1"; "Citibank merges with Travelers"; "Daimler-Benz acquires Chrysler" Yet when we look beneath the surface of all merger and acquisition activity, we see signs of a counter-phenomenon: the disintegration of the large corporation. Twenty-five years ago, one in five US workers was employed by a Fortune 500 company. Today, the ratio has dropped to less than one in 10. Large companies are far less vertically integrated than they were in the past and rely more and more on outside suppliers to produce components and provide services. While big companies control ever larger flows of cash, they are exerting less and less direct control over actual business activity. They are, you might say, growing hollow. Even within large corporations, decision 查看答案 [单项选择]In their world of darkness, it would seem likely that some of the animals might have become blind, as has happened to some cave fauna(动物群)．①So, indeed, many of them have, compensating for the lack of eyes, marvelously developed feels and long, slender fins and processes with which they grope their way, like so many bind men with canes, their whole knowledge of friends, enemies, or food coming to them through the sense of touch. The last traces of plant life are left behind in the thin upper layer of water, for no plant can live below about 600 feet even in very clear water, and few find enough sunlight for their food manufacturing activities below 200 feet．Since no animal can make its own food, the creatures of the deeper waters live a strange, almost parasitic (寄生的)existence of utter dependence on the upper layers．These hungry carnivores prey fiercely and relentlessly upon each other, yet the whole community is ultimately dependent upon the slow rain of descending food p A. To record the sound of undersea fauna. B. To search for sea monsters. C. To detect submerged submarines. D. To monitor the passing of surface vessels. 查看答案 我来回答: 提交 最新试题 ●    [单选题] 津华管道定向钻部分管段采用的防腐类型为()。 ●    [单选题]有2个输出功率相同的电机，前者型号3508,后者型号2820,以下表述错误的是 ●    [判断题]税务机关就罚款申请人民法院强制执行的,一般情形下要向当事人所在地人民法院提出申请。 ●    [单选题]一般脓肿切开引流不用 ●    [判断题] 形式美是由美的外在形态的不断积累、变化而形成的，其中包含着具体的社会内容。 ●    [单选题]保护接零系统中,插座的接地端子应( )。 网站地图 我要搜题网  版权所有  ©2023  湘ICP备18016427号   购买搜题卡查看答案 [会员特权] 开通VIP， 查看 全部题目答案 [会员特权] 享免全部广告特权 推荐91天 ¥36.8 ￥80元 31天 ¥20.8 ￥40元 365天 ¥88.8 ￥188元 请选择支付方式 微信支付 支付宝支付 点击支付即表示同意并接受了《购买须知》 立即支付 系统将自动为您注册账号 已有账号登录 找回账号密码 请使用微信扫码支付 订单号： 请不要关闭本页面，支付完成后请点击【支付完成】按钮 支付完成 取消支付 恭喜您，购买搜题卡成功 系统为您生成的账号密码如下： 账号 密码 重要提示：请拍照或截图保存账号密码！ 我要搜题网官网：https://www.woyaosouti.com 我已记住账号密码