阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
It's always thought that only those heavy things make people hard to endure.But as a matter of fact，those slight things are ____ (much) difficult to resist.It's slight，but it will always be in the bottom of your heart，making it ____ (possible) for you to get rid of it all through your life.
It's just like John Nash in “A Beautiful Mind”．You can imagine how terrible it is to live in a world full of mental illusion.When he realizes ____ (clear) about all of these but can't get rid of the illusions，his mentality will be on the edge ____ collapsing.On the other hand，Nash is happy and ____ (luck) because his wife companied with him.She used her wifely heart to forgive all.When her husband ____ (be) weak，she opened the window of his heart with her soft hands.She used her wifely endurance to go forward step by step in the difficult life.She used her wifely ____ (persist) of love.
I can still remember the scene that when old Nash ____ (stand) on the stage of Nobel Prizes，he looked at his wife full of love.I think Nash has found the answer of Balance Theory ____ he has been studying throughout his life.The balance of his life is the love of his wife.
____ changes a lot with time，only love will last forever.
重力加速度为g，则物
块上升的最大高度和返回到原抛出点的速率分别为( )