某校兴趣小组在实验室中完成制取氧气的实验。它们取氯酸钾和二氧化锰的混合物共3.0克放入大试管中加热，并在不同时刻测定试管内剩余固体物质的质量（如下表）：

分析表中数据，完成下列问题：

小数0.00000108用科学记数法可表示为____ ．

阅读下面短文，从短文后各题所给的四个选项（A，B，C，和D）中，选出可以填入空白处的最佳选项。

You Did More Than Carry My Books

    Mark was walking home from school one day when he noticed a boy ahead of him had dropped all of the books he was carrying, along with a baseball bat and several other things. Mark 1 down and helped the boy pick up these articles. 2 they were going the same way, he helped to carry some of them for him. As they walked, Mark 3 the boy's name was Bill, that he 4 computer games, baseball and history, that he was having a lot of 5 with his other subjects and that he had just broken 6 with his best friend.

    They arrived at Bill's home first and Mark was 7 in for a Coke and to watch some television. The afternoon passed 8 with a few laughs and some shared small talk, and then Mark went home. They 9 to see each other around school, had lunch together once or twice, and then both ended up from the same high school. Just three weeks before 10, Bill asked Mark if they 11 talk. Bill 12 him of the day years ago when they had first met. “Do you 13 wonder why I was carrying so many things home that day?” asked Bill. “You see, I 14 out my locker(橱柜) because I didn't want to leave a mess 15 anyone else. I had planned to run away and I was going home to 16 my things. But after we spent some time together 17 and laughing, I realized that 18 I had done that, I would have 19 a new friend and missed all the fun we would have together. So you see, Mark, when you picked up my books that day, you did a lot more. You 20 my life.”

阅读下文，回答相关问题
                                                                                                              阳光的真谛
        新春第一天，阳光灿灿的，搬了把椅子坐在老家门前的桂花树下，置身于温和的阳光中，心境格外舒坦平静。阳光从桂花树冠的叶子间漏下来，撒地成金，漏出一地秋光般的温馨想象来。在温暖之外，那是多么丰实的一种感受啊！
        二十多年前，父亲扛着锄头将山中的野桂花树移栽到了家门前，日月轮回间，它们的主干，从曾经的拇指大小长到如今碗口粗细了，二十多年的日月光华，二十多年的风霜雨雪，将它们造就得根深叶茂，妖娆动人。身在异乡，老家门前的桂花树成了我生命中的风景，一想到它们，我的心中就装满了父母亲情。这二十多年的每一个春节，为了能够陪伴在父母身边，我总是没什么理由可讲地回到了乡下，正因如此，我甚至不知道在自己所在的城市里过春节是个什么滋味。
        父亲站在门楣之下向远方眺望，他鬓如雪，发如霜，目光有些滞涩了。顺着他的目光看去，我看见了我熟稔已久的，那座属于我的家乡的最高山峰——白羊山。若是有云缭雾绕，在家门前看到的白羊山只能是若隐若现、扑朔迷离的。而眼前，白羊山是那样澄彻清朗，白色的山石如羊群撒落在山岭之上，甚至历历可数，那种山野牧歌般的氛围让人充满了对人生的念想。我坐在阳光下，坐在充溢着乡野气息的故土情愫中，阳光的手指静静地在我的发间，在我沾染着日月风尘的脸上、手上摩挲，沟渠之水带着春天的激情，唱着阳光的歌谣，在身边潺潺流淌。我收起目光，一片桂花树叶飘落在手中摊开的书页间，白纸黑字间那一叶葱绿，在阳光下泛着油亮的光泽；低眼处，满地是鞭炮的碎屑，阳光下喜庆的红色，将新春的气氛衬托得格外有神采。
父亲走进房间招呼母亲去了。去年，母亲因为一次意外，股骨骨折，不得不动换骨手术住院，母亲陷入了病痛的痛苦中。天各一方的儿女，偶尔回去探望一下，尽经济上的心力，呆一两天也就不错了。最终，呆在医院的，只有白发苍苍的父亲，他不分白天黑夜地守在病床边，悉心照看着病中的母亲。俗语说：少壮夫妻老来伴。这样的时候，父亲的行动是对这句话的最好诠释了。
        一会儿，父亲将拄着拐棍的母亲从屋内扶了出来，我搬来一张椅子放好，扶母亲坐下。父亲说，有阳光多好啊，你妈妈可以好好晒晒太阳，这样，对她的身体恢复有好处。我看了看父亲，父亲的目光虽然滞涩，但对亲情依然执着固守，散发着慈爱的光芒。他搬来一把椅子靠母亲坐下，阳光下，桂花树影间，流淌着父亲母亲一生一世的亲情，那份化不开的情感，有如秋天来临时，那满树浓郁的桂花甜香。
        阳光的真谛是什么呢？坐在父亲母亲身边，沐浴在阳光的氛围中，我想着这样一个问题。我知道，任何时候，阳光都是无私的，也是无畏的，所到之处，它总在驱逐黑寂和迷障，将遥远的距离拉近，使迷离的事物清晰，它可以让生活中失落失意的人，在刹那之间将生命看得百般珍贵，产生不舍的感觉；也可以让一颗冰冷的心复苏，燃起焰火般的渴望，透过沉郁的现在看到美丽的将来。亲情之爱呢，有如温暖的阳光，它可以让花香浓郁，生活明丽，日子香醇。