19世纪的一项重大发明导致制蜡业产生了革命性的变化，也使得照明成为普通老百姓的现实。在19世纪的早期和中期，人类发现了利用碱和硫酸提炼动物脂的工艺，其产品硬脂比没有提炼的动物硬脂更加坚硬，燃烧时间也更长。这一发明创造意味着人类可以生产出点燃时无太多烟尘和太臭气体的脂蜡。
下列关于19世纪人类发明了硬脂产品以后的各项说法中正确的一项是( )。
A．蜡燃烧时没有太多烟尘
B．蜡燃烧时散发出香味
C．蜡没有达到普遍使用
D．蜡燃烧时间不长
参考答案：A
解析：本题考查对文段细节的把握。开头的“使得照明成为普通老百姓的现实”说明蜡已经开始普遍使用，排除C项。由“燃烧时间也更长”排除D项。而句子最后“这一发明创造意味着人类可以生产出点燃时无太多烟尘和太臭气体的脂蜡”可以直接选出A项为正确答案。故选A。
I have a nice family. Only 36 people are in it. They’re my 37 , my mother and me. Here is a 38 of my family. This is my father. He likes dogs (狗) and he has a white 39 . The name of it is Tony. Look! Tony is next to (挨着) my father 40 the photo. Look at my mother. She 41 to cook (烹调). She cooks 42 food for us every day. This is me. I’m 11. I’m in a good 43 . I like English and our English classes are 44. I like playing sports and I like 45 sports games on TV. My family is nice and I like it.
|