【简答题】藻类植物的体制有( )体、( )体和( )体三种类型。
【单选题】民国时期有人撰文说: “他是中国思想界的一个清道夫,他把启蒙的水洒向那孔孟弥漫的大道上。因此时时被那无数吃惯孔盂的老头子们跳脚痛骂,怪他不识货。”文中的“他”在近代中国发起了
【单选题】— Look! Mr Hu is on the other side of the stree. — It ______ be him. He has gone to England. [ ]
【单选题】氮、磷等无机营养物质大量排入水体,会造成水体富营养化,严重时可引发蓝藻暴发,使水域生态遭到破坏。控制蓝藻疯长,同时“变废为宝”是减轻“绿色灾害”的有效途径。请回答下列有关问题:
采用浮床生态工艺法(如图所示)可治理水体污染,改善水质。其机理正确的是() ①植物吸收水中悬浮物 ②植物吸收水中的NO 3 - 、PO 4 3- 等,降低水中氮、磷等含量 ③浮床遮光,抑制浮游藻类的生长繁殖,防止水华发生...
【多选题】下列指令中属于特殊编程功能指令的是( )。
【单选题】Stree may be caused by __________.
C.
unfamiliar subject matter
【单选题】On which of the following streets is the financial centre of the U.S.10cated?
【简答题】A.Surname. B.First name. C.Address. D.Age.
【单选题】var str = "hello"; String.prototype.second= function(index){ return str[index]; } 则str.second(0)的值是()
【简答题】Compared with the rare school killings, children are more likely to be killed in the streets or in their homes because of ______ that begun in the mid1980s.