一定温度下，对可逆反应A（g）+2B（g）3C（g）的下列叙述中，能说明反应已达平衡的是 A：C生成的速率和C分解的速率相等 B：单位时间内消耗amolA同时生
On the top of the hill _________ the old man once lived． A．a temple stands there in which B．stands a temple where C．a temple standing on which
It was with great joy _____ he received the news that his lost daughter had been found. A. because B. which C. since D. that
水是生活中常见的物质，可用化学式H2O表示。下列对于水的认识正确的是 A．水由氢原子和氧原子构成 B．水由氢元素和氧元素组成 C
—Why not join us in the game, Kitty? —_______, but I have to do my homework first． A．Let’s go B．I’d like to C．Yes, please D．It’
如图所示，电源电压保持不变，开关S闭合后，当滑动变阻器R：的滑片P向左移动时，电流表和电压表示数的变化情况是 （ ） A.电流表的示数变
--- A second, please. I have another call coming through. --- _______. I’m not in a hurry. A. Enjoy yourself B. Leave me alone C. Do as you like D. Take your time
价格与价值的关系是 ①价值是价格的基础 ②价值与价格永远是统一的 ③价值是相对稳定的，价格是多变的 ④价格与
