98989100001 83×7560 160÷32160÷4÷8
那儿 环境宁静, 景色宜人。 在早晨、黄昏、晴天或雨天,她 非常迷人。
不但……而且…… 因为……所以……
无论……都…… 虽然……但是……
Do you know about the sun, the moon or the earth? Let me tell you. The sun is a star. It is big and bright. It is hot. And it gives us light and heat(光和热量). We need the sun. Animals and plants both need it. The moon is a satellite(卫星). It goes around (围绕...转) the earth. On the moon there is no water or air(空气). So no people live on the moon. The earth is a planet(行星). It goes around the sun. It is our home. We live on the earth. So we should love our home-the earth.
①绝无仅有
②惟妙惟肖
③宏伟
平行四边形具有性,即变形.
囊萤夜读 悬梁刺股 凿壁借光 铁杵成针 程门立雪 手不释卷
计算25×44时我运用的运算定律是:(用符号表示)