①要积极承担责任

②要以自己的行动对社会、对自己负责

③担当起责任，有助于我们收获美丽人生

④认清责任，就一定能成为负责任的人

下面是小娜和张婷同学做“探究响度与什么因素有关”的实验，回答下列问题：

将系在细线上的乒乓球轻触正在发声的音叉．观察到乒乓球被弹开的现象 （如图所示）．

    Recently I failed an exam. However, after I came out of my teacher's office, I told myself, “Smile! It's not so serious.”

    I smiled a big smile and it worked a little, really.

    Everyone gets frustrated sometimes. I used to be always influenced by ____ (press) and I ____ (be) often in low spirits. But one day I came ____ a sentence in the Bible. “Do not be anxious about tomorrow, for tomorrow will be anxious for itself, let the day's own trouble be sufficient for the day.” It suddenly struck me, “____ (worry) about a problem doesn't help. Why not just give a big smile and face up the trouble?”

    Now every time I want to cry, I remind myself that laughter is better than ____ (tear) and anger. I____ (convince) that there's something magical about a smile. A smile helps me recover confidence and gives me the courage to move on.

    Remember, whenever ____ (face) with a setback, whenever you've been treated ____ (unfair),____ it takes is determination and you can feel happy again. Smile at life,____ it will shine on you.

学校初中部的科技活动小组的同学们准备自己动手制成弹簧测力计，它们选了A，B两种规格不同的弹簧进行测试，绘出如图所示的图像，图像中只有OA段和OB段是弹性形变，若它们要制作量程较大的弹簧测力计，应选用弹簧____，若要制作精确程度较高的弹簧测力计，应选用弹簧____。(均选填“A”或“B”)

动物的行为是指动物在体内外受刺激下产生的活动表现，如动物的运动、鸣叫、身体姿态或颜色的变化等，它是受____和____的调节，受____决定的．