观测月球等天体时应选用 ____镜，观察细胞内部结构时应选用 ____镜．

阅读理解 阅读下面短文，从每题A、B、C、D 四个选项中，选出一个能回答所提问题或完成所给句子的最佳答案。
                                                            The City Mouse and the Country Mouse
    Once there were two mice. They were friends. One mouse lived in the country; the other mouse lived in the city. After many years the Country mouse saw the City mouse; he said, "Do come and see me at my house in the country." So the City mouse went. The City mouse said, "This food is not good, and your house is not good. Why do you live in a hole in the field? You should come and live in the city. You would live in a nice house made of stone. You would have nice food to eat. You must come and see me at my house in the city."
    The Country mouse went to the house of the City mouse. It was a very good house. Nice food was set ready for them to eat. But just as they began to eat they heard a great noise. The City mouse cried, "Run! Run! The cat is coming!" They ran away quickly and hid.
After some time they came out. When they came out, the Country mouse said, "I do not like living in the city. I like living in my hole in the field. For it is nicer to be poor and happy, than to be rich and afraid."

选出依次填入文中括号内最恰当的一组词语（    ）

齐白石的画大体是某植物和一两只草虫结合在一起，植物用意笔，草虫用工笔。那些莲叶啦，树丛啦，〔①〕好像是用大笔饱蘸了墨汁随便挥洒而成；而那些蝉啦，蚱蜢啦，则画得细致极了，那真是〔②〕描绘出来的，纤细的触须，虫翅上的脉络，都〔③〕。这两种笔墨结合在一起，彼此衬托，〔④〕：植物更显得欣欣向荣，草虫更显得〔⑤〕。

在括号中选出标点符号使用最恰当的一项是（  ）
①“闲”字的古体字是“门”字里面加个“月”，这样的构想实在巧妙：门里望月，焉能不“闲”（  ）②曾有人问我如何处理人际关系（   ）我的回答是：尊重他人，亲疏随缘。③亚马逊河、尼罗河、密西西比河（  ）和长江是世界四大河流。