The sun went down when an old man came to a small mountain village with a heavy bag. He found an inn(小旅馆) and wanted to stay there for the night.
   After he had gone to his room, the owner of the inn said to his wife, “Look at his heavy bag, dear! I’m sure there’re a lot of valuable(贵重的) things. I want to steal it when he’s asleep tonight.” “No, no,” said his wife. “He must look for his bag tomorrow morning. Then he’ll take you to the police station.”
   They thought hard and at last the woman had an idea. “We have forgetful grass,” said the woman. “Why not put some into his food? If he has the food, he'll forget to take his bag away tomorrow morning.” “How clever you are!” said the owner, “don't forget it when you cook supper for him.”
   The old man had the food with forgetful grass and went to bed. The next morning, when the owner got up, he found the door was open and the old man had left. He looked for the bag for a long time, but he didn’t find it. He hurried to wake his wife up and said angrily, “What a fool! Your forgetful grass isn't useful at all!”
“No, no,” said the woman. “I don't think so. He must forget something.”
“Oh, I’ve remembered!” the owner called out suddenly, “He forgot to pay us the bill!”

下列各句中，划线词语使用最恰当的一项是（    ）

①众嬷嬷引着（林黛玉），便往东转弯，穿过一个东西的穿堂，向南大厅之后，仪门内大院落，上面五间大正房，鳞次栉比。

②老渔夫桑地亚哥在返回渔港的路程中，看到一条巨大的鲭鲨向他飞速游来，他知道那是一条毫无畏惧且为所欲为的鲨鱼。

③鲁四婶愤愤的说：“你自己荐她来，又合伙劫了她去，闹得沸反盈天的，大家看了成个什么样子？你在拿我们家开玩笑么？”

④少不更事的我们往往异常勇敢，自以为只要敢拼就能实现梦想，听不进别人的任何忠告，常在现实的南墙上撞得头破血流。

⑤鲁迅先生不仅是“五四”新文化运动的伟大旗手，而且也是现代版画艺术的始作俑者。

⑥在崇高的理想和感情基础上产生的趣味,和趣味主义是不可同日而语的。

阅读下列材料：
材料一 在唐初诸帝时代，中国的温文有礼、文化腾达和威力远被，同西方世界的腐败、混乱和分裂对照得那样地鲜明，以致在文明史上立刻引起一些最有意思的问题。中国由于迅速恢复了秩序和统一而赢得了这个伟大的领先。                     
——韦尔斯《世界史纲》
材料二 清朝在康熙、雍正、乾隆帝时期，经过同外部侵略势力及内部民族分裂势力的一系列重大斗争，建立起一个空前统一和巩固的国家。这就基本奠定了今天中国疆域的规模。
——张传玺主编《中国古代史纲》
材料三 内战首先使美国原来宪政机制中分裂的主权得到了统一。它为美国大工业化的发展，准备了条件。这个是一个先行，如果说，主权得不到统一，领土不能够得到统一，或者劳动力体制得不到统一的话，后面的大工业化还会推迟，或者不会产生这么大的效果。
很多美国历史学者认为，南北战争是美国历史上的一道分水岭。联邦政府从此变得强大起来，美国的农业、工业以及整个国家都发生了重要的转变。    
——《大国崛起 美国》

下列物品中属于导体的是