题目

在平面直角坐标系中，点A（1，2）关于原点对称的点为B（a，b），则a•b＝_____． 答案：【答案】2【解析】直接利用关于原点对称点的性质得出a，b的值，进而得出答案．∵点A（1，2）关于原点对称的点为B（a，b），∴a＝﹣1，b＝﹣2，∴a•b＝2．故答案为：2．To advertise effectively today, you must abandon the old-school idea of “reaching the masses”. All advertising is local and personal. The key to effective advertising today is to focus on the     45  .Some are the     46   ways every advertiser could work out. You can print a specific offer of your goods or service on door-hangers and place them on doorknobs in your area. Door-hangers on doorknobs will produce results in direct     47   about the strength of your offer. If you need to reach the drivers, flyer (宣传单) under windshield (挡风玻璃) wipers may have better effect than door-hangers. Imagine, how     48   if you hire someone to be a walking ad or launch a T-shirt advertising,     49  , you can print your products on T-shirts of your     50  . In the early 1970s “Hamp Baker says Drive with Care” was spray-painted on cars, which was a public service ad. Ever since, spray-painted sign has become more and more    51  .More grand ways are as follows: virtual showroom. Build a website to    52   a virtual showroom. Use it when people call to ask    53   about your company, your products or your services. Also you can even use an old slide projector to put on a nighttime show. They’re    54   effective, and in the long run, cheap. Nothing is quite as powerful as a public    55   that seizes the public’s attention. You can invite a band to give a performance.    56  , you can hire famous models to show it vividly.Nothing screams “expert” quite as loudly as a book written about a subject. You simply can’t    57   the power of your name on the cover of a book. You might only sell a few copies online, but the copies you give away in your town will make you a fortune. You won’t make money on the book. You’ll make it because of the book.Of course, word-of-mouth is the best way to promote your    58  . Friends and past customers recommend your products to their family, friends and colleagues. Word-of-mouth works because the    59    is based on previous positive experiences. 【小题1】 A．person B．product C．individual D．style 【小题2】 A．special B．common C．amusing D．normal 【小题3】 A．description B．decision C．discussion D．permission 【小题4】 A．surprising B．funny C．impressive D．amazing 【小题5】 A．that is B．at the same time C．as a result D．on occasion 【小题6】 A．customers B．employers C．consumers D．employees 【小题7】 A．expensive B．usual C．popular D．meaningless 【小题8】 A．refer to B．serve as C．stand for D．use as 【小题9】 A．location B．business-hours C．salary D．details 【小题10】 A．unbelievably B．consequently C．accidentally D．occasionally 【小题11】 A．speech B．sport C．debate D．performance 【小题12】 A．For example B．Moreover C．However D．To be exact 【小题13】 A．create B．guess C．imagine D．think 【小题14】 A．production B．reflection C．consciousness D．business 【小题15】 A．information B．relationship C．pronunciation D．achievement