“元”的甲骨文构形象一个站立的人，突出其头部。所以，元的本义是（ ） A．元气 B．人头 C．头发 D．上部 ……

未分类题If a certain company purchased its computer terminals for a total of $540,400 and each of the terminals was purchased for $350, how many terminals did the company purchase?E.1264

未分类题What is the cost, in cents, of using a certain fax machine to send n pages of a report if the total cost for sending the first k pages is r cents and the cost for sending each additional page is s cents? (Assume that n>k. )A.r+s (n-k)B.r+s (n + k)C.rs (n + k)D.kr+s (n-k)E.kr+ns

未分类题A rectangular floor 18 feet by 10 feet is to be completely covered with carpeting that costs x dollars per square yarD.In terms of x, how many dollars will the carpeting cost? (1 yard = 3 feet)E.540x

未分类题If the cost of a long-distance phone call is c cents for the first minute and 2 3 c cents for each additional minute, what is the cost, in cents, of a 10-minute call of this type?A.5 3 cB.6cC.20 3 cD.7cE.23 3 c

单项选择题反应中最易被溴代的H原子为: ( ) A. 伯氢原子 B. 仲氢原子 C. 叔氢原子 D. 没有差别