【单选题】下列关于溶液型气雾剂的叙述错误的是
C.
药物可溶于抛射剂(或加入潜溶剂)时,常配制成溶液型气雾剂
【单选题】I could have turned to Mr. Smith for help, but he ______ too busy then.
【简答题】请用代码简要描述如何画出自定义短信备份按钮的外层圆圈。
【简答题】Questions 3 and 4 are based on the news report you have just heard. 3. A) He is a queen bee specialist. B) He works at a national park. C) He removed the bees from the boot. D) He drove the bees away ...
【简答题】He didn’t go to the party, but he does wish he ________ there. A) would be B) has been C) would have been D) had been
【简答题】某海域一艘轮船发生故障,船上雷达搜索附近显示: 军舰:东偏北40度方向300千米处. 货船:西偏北30度方向300千米处. 商船:南偏东o0度方向o50千米处. (1)请根据雷达搜索显示,在平面图上画出他们t位置. (o)如果商船以每小时50千米t速度赶往出事点,需要几小时?军舰想与商船同时赶到,每小时至少行驶得少千米?
【单选题】若反应 2NH3(g) ≒ N2(g) + 3H2(g) 在某温度条件下的标准平衡常数是0.25,则在该温度下氨合成反应 1/2N2(g) + 3/2H2(g) ≒NH3(g) 的标准平衡常数是( )
【单选题】在下列平衡表达式K 1 、K 2 、K 3 的关系是( ) 。 N 2 (g)+3H 2 (g)≒2NH 3 (g) K 1 N 2 (g)+ H 2 (g)≒NH 3 (g) K 2 N 2 (g)+H 2 (g)≒ NH 3 (g) K 3
【单选题】若反 应 N 2 (g)+ H 2 (g) ≒ NH3(g) 在某温度下的标准平衡常数为 2 ,那么在该温度下氨合成反应 N2+3H 2 ≒ 2NH3 的标准平衡常数是 ( )