一定条件下，体积为10L的密闭容器中，1 mol X和1 mol Y进行反应：2X(g)+Y(g)Z(g)，经60s达到平衡，生成0.3mol Z。下列说法正确的是

题干

一定条件下，体积为10L的密闭容器中，1 mol X和1 mol Y进行反应：2X(g)+Y(g)

Z(g)，经60s达到平衡，生成0.3mol Z。下列说法正确的是

A：反应进行30s时，正反应速率等于逆反应速率

B：反应进行80s时，逆反应速率大于正反应速率

C：以Y浓度变化表示的反应速率为0.001mol/(L·s)

D：反应进行80s时，X物质的量浓度为0.04mol/L

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D

This summer, Mary, Tom, Alan are going to have an ideal vacation .
The followings are their plans for the coming vacation .

	Mary	Tom	Alan
Where ?	The Great Wall	Spain	Canada
When?	The first week in June	The last day of the May	June, Monday 18^th
Who ?	His parents	His best friends	His cousin
What ?	Going hiking , Going sightseeing, Visiting some famous places in Beijing, Going shopping	Going sightseeing Going shopping Going camping Watching bull(牛)-fight	Spending time in the countryside , Renting videos at night , Going fishing , Going hiking, Sleeping a lot
How long?	About one month	Only two weeks	Until September
Transportation	By plane and by bus	By boat and by plane	By plane and by train