针对“地圆学说”，清朝士大夫杨光先说：“若四大部州，万国之山河大地，是一个大圆球……球上国土之人之脚心与球下国土之人脚心相对……竟不思在下之国土人之倒悬……有识者以理推之，不觉喷饭满案矣！夫人顶天立地，未闻有横立倒立之人也……此可以见大地之非圆也。”之所以有这样言论，是因为他不知道（    ）

读台湾经济发展历程和特点图表，完成下题

20世纪50年代
农业和农产品加工业	主要出口蔗糖、水果、稻米和樟脑
20世纪60﹣90年代
出口加工业	主要出口纺织服饰、玩具和日用电子消费品
20世纪90年代
高新技术产业	主要出口软件、晶圆、集成电路板

将洋葱表皮细胞分别放在0.3g/mL的蔗糖溶液、0.3g/mL的KNO₃溶液和清水中，其原生质体积随时间推移而变化的曲线（如图）分别是（  ）

根据课文和首字母填空。
    Sandy and Sue are in a shop. They want to buy two p____ of sweets，but they are one shilling e____. That's all their p____ money. At last, they buy two small lollipops i____.
    In the afternoon, Sandy and Sue come back home from school. Tea's r____. Sandy and Sue are very h____, but Sandy's hands are very d____. Mother asks Sandy to go and w____ his hands at o____. Now Sandy's hands are clean. Look at Mum's nice clean t____! Sandy cleans his hands with it.
    On Sunday, Sue and Mum are going shopping. Mum sees a pair of nice s____, so she wants Sue to t____ them on. They are very t____ for Sue. Sue wants the pink ones and she thinks they're very p____. They're j____ right.

下列句子中划线的词语使用正确的一项是（    ）