题型:问答题 简答题 在体积为V L的恒容密闭容器中盛有一定量H2,通入Br2(g)发 生反应:H2(g)+Br2(g) 2HBr(g) ΔH<0。当温度分别为T1、T2,平衡时,H2的体积分数与Br2(g)的物质的量变化关系如图所示。下列说法正确的是A.由图可知:T2>T1 B.a、b两点的反应速率:b>aC.为了提高Br2(g)的转化率,可采取增加Br2(g)通入量的方法D.T1时,随着Br2(g)加入,平衡时HBr的体积分数不断增加 查看答案
题型:问答题 简答题 书面表达。 最近,教育部启动了“阳光体育”运动,建议全国中小学生每天锻炼一小时,让他们健康、快乐。此项活动受到广大学生的欢迎。李华对所在学校学生参加活动的情况和反映做了一个调查。请你根据下面调查表的内容,帮他给校报写一篇报道。报道的开头和结尾已给出。 词数:80词左右。Interviewees (调查对象)ActivitiesFeelingsReasonsmost studentsplay sportsinterestedhave lots of funmany studentsskip rope (跳绳)happykeep healthysome studentstake a walkrelaxedenjoy fresh air instead of staying in the classrooma few studentsworriedhave no enough room (空间) on the playground; have no enough time to finish homework The "Sunshine Sports" program is warmly welcomed in our school. Nearly all the students have taken part in it. _____________________________________________________________________________________________________________________________________________________ No matter what students think about the program, all the students like the idea which is to make students happy and keep them fit at the same time. 查看答案
题型:问答题 简答题 Good health is __________ most people take for granted--- until they lose it .A.anything B.everything C.nothing D.something 查看答案