【单选题】氯消毒副产物主要是由水中的哪些物质和氯反应生成的( )
【简答题】When 18th-century scientists first came across Australia’s platypus(鸭嘴兽), they thought it was a trick. It is not surprising that the platypus made people confused. This funny-looking animal has feet a...
【简答题】牵 牛 花(片段) 叶圣陶 手种牵牛花,接连有三四年了。种在十来个瓦盆里,无从取得新的泥来加入,便从城隍庙的花店里买了一包过磷酸骨粉,搀和在每一盆泥里,这算代替了新泥。 瓦盆排列在墙脚,从墙头垂下十条麻线,每两条距离七八寸,让牵牛的藤蔓缠绕上去。这是今年的新计划,往年是把瓦盆摆在三尺光景高的木架子上的。这样,藤蔓很容易爬到了墙头;随后长出来的互相纠缠着,因自身的重量倒垂下来,但末梢的嫩条便又蛇头一...
【简答题】Ireland has had a very difficult history. The problems started in the 16 th century when English rulers fried to conquer(征服) Ireland. For hundreds of years, the Irish people fought against the English...
【简答题】阅读理解。 Ireland has had a very difficult history. The problems started in the 16th century when English rulers fried to conquer (征服) Ireland. For hundreds of years, the Irish people fought against the E...