题目

The culture of Trinidad and Tobago, an island country located in Caribbean Sea, 61__________ (be) focused on carnival and music. As a matter of fact, Carnival is the most well-known cultural festival, and calypso and steel band music are both 62__________    (international) popular. Each year just before Ash Wednesday, excited vacationers and locals flood the streets 63 __________(watch) parades and celebrate. Partygoers, 64__________wear brightly-coloured costumes, spend their days dancing and partying in the streets. The original carnival celebration was only for the ordinary peop下列关于热化学反应的描述中正确的是 A．HCl和NaOH反应的中和热△H＝－57.3kJ/mol，则H2SO4和Ca(OH)2反应的中和热  △H＝2×(－57.3)kJ/mol B．CO(g)的燃烧热是283.0kJ/mol，则2CO2(g)===2CO(g)＋O2(g)反应的 △H＝（+283.0kJ/mol）×2 C．需要加热才能发生的反应一定是吸热反应 D．1mol甲烷燃烧生成气态水和二氧化碳所放出的热量是甲烷的燃烧热