【单选题】He was so tired that as soon as he lay down he fell _______ asleep.
【简答题】利用得失电子守恒,配平下列方程式。 KMnO 4+ + HCl = KCl + MnCl 2+ + Cl 2 ↑+ H 2 O
【单选题】He was so deep in thought,thinking of the problem ________ he knocked into the tree without noticing it.
【单选题】He earns a good salary, so he ____ be deep in debt.
【单选题】He earns a good salary, so he _______be deep in debt.
【单选题】He is in deep sorrow, so it is not a(n) time to mention the subject.
【判断题】有个别不良商家造香手段低劣,利用化学香结香,此类人造沉香不仅香味难闻,而且对身体有害。