想请教一道化学的判断题When an atom has an excited electron drop to a lower available energy state,it emits energy in the form of a photonTrue or False

想请教一道化学的判断题When an atom has an excited electron drop to a lower available energy state,it emits energy in the form of a photonTrue or False 一道化学关于硅的判断题 SAT2化学的一道判断题The entropy of a solid increases when it is dissolved in solvent BECAUSE it becomes less ordered.上面这句话是完全正确的,但谁能帮我解释一下为什么? 一道判断题,判断正误,说明原因.如果lim an=A,那么对一切正整数n,都有an 请教一道英语题:Here's an apple.的复数形式是什么?谢谢! 请教一道电工题,求A点的电位? 请教一道判断题,圆周率就是3.14是错误还是正确的? 请教一道英语填空题I remember________this used to be a quiet village.我填when,答案是that这里是宾语从句啊,when为什么不行? 请教一道英语选择冠词题When Jenny left( )college,she got a jobas ( )journalist.A /;a B.the;/ C.a;the D.the;the 空气是一种重要的化工原料吗?是我试卷的一道化学判断题 一道英语从句的题； Those successful deaf dancers think thatdancing is an activity ____sight matters more than hearing.A when B whoseC whichD where 请教一道减数分裂的题（灌水,抄袭勿入谢谢）第9题,请问怎么判断谢谢 请教一道自考的线性代数的题 请教一道高数的证明题设b>a>e,证明(a^b)>(b^a) 请教一道关于求极限的题 请教一道矩阵的运算题 请教一道高数积分的题, 请教一道通信原理的题