问题 填空题

“化学…我们的生活,我们的未来”

①“化学使天更烂,水更清.”汽车尾气处理装置能使某些有毒气体转化为无毒气体:2NO+2CO→N2+2CO2该反应涉及的物质中,______ 在空气中含量最高,______ 是光合作用的原料,能与血红蛋白结合的是 ______ .竹子可加工成具有吸附作用的物质,其作用与实验室中常用的 __________ (填物质名称)相似.

②“化学为人类提供动力.”氢能属于绿色能源,氢气燃烧的化学方程式是____________________________________ .可燃冰是一种新型能源,在我国南海储量很高.其主要成分为甲烷(CH4),甲烷属于 _________(填“无机物”或“有机物”).

③“化学为生命密码解锁.”DNA承载着生命遗传密码,胞嘧啶(C4H5ON3)是DNA水解产物之一.胞嘧啶由_______种元素组成,6.02×1024个C4H5ON3分子的物质_______mol.

答案

①N2;CO2;CO;活性炭;

②2H2+O22H2O;有机物;

③4;10.

填空题

Marks & Spencer has a very good reputation for job security and looking after its staff, with things like good perks, (1) , that sort of thing. Do those things actually (2)
I think it is, it is very important. When people have been working (3) , and they may have been in from seven or eight o’clock in the morning, they can come off the sales floor and can go to (4) and obviously they can have tea, coffee, or (5) , and can then buy at very reduced rates (6) , if they want one, or a roll and cheese, in a pleasant environment, (7) , food of the highest quality, there’re areas where they can (8) , or play pool or something, yeah, that is very important because they need (9) . At busy times, they need to get away from it, they need to be able to relax. In terms of all the (10) we’ve got, that is very important, when people know that they will be having medicals, and (11) is another thing, obviously there’s (12) that they will buy which they will be able to buy (13) . For Christmas bonus, we give all our general staff (14) which is guaranteed, and the (15) of that, actually, at the busiest time of the year when they’re (16) and working hard, is fantastic and to see their faces as you (17) with 10% of their salary in it. I believe the environment that you work in, (18) that you work with, the way you are treated, (19) , and the fact that your views are listened to, and you feel you are consulted, that makes people (20) and makes them get up and come to work in the morning.

单项选择题