目前有部分学生在做作业或考试时，喜欢使用修正液(涂改液)，经实验证明，修正液中含有多种挥发性有害物质，吸人后易引起头晕、头痛、严重者会呼吸困难、抽搐。三氯乙烷(CH₃CCl₃)就是其中的一种。下面关于三氯乙烷的几种叙述正确的是(    )。

果树能产生种子，种子可以萌发并长成新的植物体，这说明（  ）

如图，在平面直角坐标系中，O为坐标原点，△ABC的边BC在y轴的正半轴上，点A在x轴的正半轴上，点C的坐标为（0，8），将△ABC沿直线AB折叠，点C落在x轴的负半轴D（﹣4，0）处．

函数f（x）=x³﹣ax²﹣bx+a²在x=1处有极值10，则点（a，b）为（   ）

完形填空
    Those who believe that they will never do well in a particular area probably never will. Those who believe they are not good at1will forever feel unprepared. But those who believe that it is2to succeed at what they attempt can surprise themselves.
    Adam was ready to3.His wife Anna, however, was less4.As she explained to a friend, "Adam has5done anything that required physical strength. When he retires, he will sit in his easy chair and6me to bring him his food.”
    But to Anna's7, soon after her husband retired, he8a health club. Arriving home from exercise class one night, he announced,  "I9for the wrestling tournament. I am going to10Friday night.”Anna was shocked. "Please don't do it, Adam. You're not in11.You will be so beat up that they will have to carry you home!”12,he couldn't be persuaded and she told him that if he wanted really to do it, she was not going to watch.
    13to her word, she stayed away as Adam wrestled. And just as she14, two men carried Adam home. He15down on the bed, every muscle pained and wounded.16she could speak, he cried out," Don't say a(n)17, Anna! This is not the worst of it. I18tonight. I have to wrestle again tomorrow night!”
    Nothing 19in your life until you believe you can do things that are important to you. And if you have a low20of yourself, nobody else is likely to raise it.