()We are glad to make you our lowest price for 100 gross of Men's Shirts at USD 8 per piece CIF Lundon, shipment in May, which is subject to you reply reaching us before 5 o'clock P.M. on Friday , March 6th, Beijing Time.
【简答题】(1)(3分)某元素的原子结构示意图为: 该元素的原子有______层电子,最外层有______个电子,原子核内有______个质子. (2)(2分)香烟燃烧产生的烟气中含有许多有害物质,其中对人体危害最大的是尼古丁(化学式为C 10 H 14 N 2 ).一个尼古丁分子中含有______个原子,尼古丁中碳、氢、氮三种元素的质量比为______.