【单选题】Why did the speaker miss the appointment with Mr. Coleman?
A.
He had to write an advertisement.
B.
He was held up in traffic.
C.
He had to attend a different meeting.
D.
He was on a business trip.
【简答题】What is being done to make the T-shirts more attractive? [A] New technology. [B] Advertisements. [C] New designs. [D] More artificial materials.
【单选题】pH 是描述溶液酸碱性的一个重要指标 , 下列说法不正确的是 ( )
A.
正常情况下 , 人体血液的 pH 总保持在弱碱性范围
C.
测得某温度下的某某品牌的纯净水 pH = 6 , 则该纯净水呈酸性
【简答题】What do you think is the best title for the passage? B) How to Make an Advertisement. C) How to Sell Product. D) How to Attract More Buyers.
【单选题】人体血液的正常酸碱度在pH值为()范围,属于中性偏碱的环境。
【单选题】You can go to a travel agency and ask for a holiday______.(2011-74)
【简答题】铁是人类较早使用的金属之一。运用铁及其化合物的有关知识,回答下列问题 : ( 1 )铁和铁合金是生活中的常用材料,下列叙述中,正确的是 ________ 。 A. 纯铁硬度比生铁高 B. 纯铁耐腐蚀性强,不易生锈 C. 不锈钢是铁合金,只含金属元素 D. 铁在一定条件下可与水蒸气反应 E. 铁在冷的浓硫酸中钝化 ( 2 )向沸水中逐滴加 1mol/LFeCl 3 溶液,至液体呈透明的红褐色,该反应...
【单选题】______ An article will sell well as long as it has just-so-so quality and good advertisement.
【单选题】低压蒸汽加甲醛灭菌法 70-80°C需要保持________。