下列关关化肥的说法不正确的是( )
A:CO(NH2)2(尿素)、(NH4)2SO4和NaNO3均属于氮肥
B:过磷酸钙加熟石灰研磨能闻到刺激性气味
C:区分化肥一般先观察外观、溶解性,再观察化学反应中的现象
D:过度使用化肥可能导致土壤酸化,水域中氮和磷含量升高
“骏马能历险,犁田不如牛;坚车能载重,渡河不如舟;舍长以求短,智者难为谋。”这启示我们要( )①扬长避短 ②夸大自己的长处,忽略自己的不足③正确认识自己 ④客观评价自己
We have a big playground in our school .We all like to 1 games 2 after school .It's Friday .We have only two classes 3 the afternoon . 4 school is over(结束的),a lot of students go to the playground quickly. The boys of Grade Two often 5 soccer. The girls like 6 them playing .Soccer is their favorite sport . Their teacher Mr Li also 7 football. Li Ming , Li Lei and Wei Fang are students of Grade One .They sometimes play 8 the students of Class Two. It’s half past five 9 . It's time 10dinner . My father is waiting for me at the school gate .
某思想家曾作诗咏《中秋》:“吾心自有光明月,千古团圆永无缺。山河大地拥情辉,赏心何必中秋节。”该诗体现出的思想属于( )
图1:半坡人面鱼纹盆——1955年陕西西安半坡出土的陶器。
图2:女娲补天的传说,出自古书《淮南子》。
图3:河姆渡猪纹陶钵——1973年浙江余姚河姆渡遗址出土的黑陶猪纹钵。
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