问题
填空题
栽培稻种在植物分类学上属()属植物。目前全球稻属植物有20多个种，栽培稻只有()个种，即（）和（）
答案
参考答案：禾本科稻、2、普通栽培稻、非洲栽培稻
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栽培稻种在植物分类学上属()属植物。目前全球稻属植物有20多个种，栽培稻只有()个种，即（）和（）
参考答案：禾本科稻、2、普通栽培稻、非洲栽培稻
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| There are times in our lives when we remember. Remembering the good things of __1__is a most precious (宝贵的) time; these memories are __2__ in the corner of my mind. When I was four years old, I often went to a kindergarten (幼儿园). I __3__ many toys and friends that made me laugh and cry. The teachers were __4__ and friendly. They taught us many interesting songs and games. We played all day long. We did not know what learning was at that time, __5__we were learning every day. When I was __6__years old, I started school. I was very __7__because I became a school student and began to learn school subjects. My favourite subject was __8__. I remember, the first day, our science teacher told us the sun was like a big fire ball and __9__ was very, very far away. Nobody could stay close to that "ball". We were quite surprised and kept our mouths open. We began to wonder at the __10_of the universe(宇宙). Later on, more ideas __11__weather, planes, railways, wildlife, deserts and even pollution came to our ears. We began to learn __12__. When I was about ten years old, I __13_quite a lot of things. I began to read newspapers, keep a diary, visit museums __14_make many friends. Every day was something new. Every day was interesting and exciting. Now I am in the middle school. Each day is new to me. Happily I am still learning, which is like a journey to me. I have finished the first part, but there is still a long __15_ for me to go. I hope I will become a learned person someday.
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