题目

在一定条件下的密闭容器中，某一反应中M、N的物质的量随反应时间变化的曲线如图所示，下列表述中正确的是A．反应的化学方程式为2MN    B．t2时，正、逆反应速率相等，达到平衡C．t3时，正反应速率大于逆反应速率 D．t1时，N的浓度是M的浓度的2倍 答案：D语法填空1.Forbes 2014 shows that Bill Gates is still ___________(wealthy) person in the world.2.Everyone we talked to spoke _________ (high) of him.3.If things continue like this, China will only be ___________ (know) for tea and pandas.4.Do you like the horror film _________(direct) by Cindy Clack?5.The climbers tried their best and reached the top of the mountain _____________ (succeed).6.She will never forget the __________ (please) experiences while working there.