【单选题】If you have difficulty in learning English, I have some ____ to help you.
【单选题】I had thought I would have difficulty in solving the problems, but as a matter of fact, I met ______.
【简答题】I have difficulty in waking up by myself in the morning. I need a(n) .
【单选题】She is suffering from obesity. It's difficult for me to walk fast and I have difficulty in breathing.中的obesity可以用以下哪个单词代替?
【单选题】I have some difficulty in finding his house. I wish I_____his address.
【单选题】I have no difficulty in making _____ understood in English.
【简答题】分馏与简单分馏的根本区别在于 __________________ 。在简单蒸馏中,由混合液体蒸出来的蒸汽仅仅经历很短的途径,即毫无阻碍地进入 ________ ;而在分馏中,上升的混合蒸汽须经过分馏柱后才能被冷凝收集。
【简答题】精馏和普通蒸馏的根本区别在于_______;平衡蒸馏(闪蒸)与简单蒸馏(微分蒸馏)的区别是_______。
【简答题】I have difficulty in this book. 我读这本书有困难。