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【多选题】
下列对JavaScript语言描述正确的是A.
JavaScript是Web页面中的一种脚本语言文字
B.
JavaScript用于为页面添加动态效果
C.
JavaScript可以替代HTML和CSS
D.
JavaScript语言的前身是LiveScript语言
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【简答题】Ⅰ.在实验室制备少量纯净的KCl。现有含少量KBr和K 2 SO 4 的氯化钾样品，按照下图所示的实验方案进行提纯。 （1）过滤时需要用到的玻璃仪器有 。 （2）检验加入BaCl 2 溶液后SO 4 2 － 是否沉淀完全的操作为 。 （3）若用硝酸钡来代替氯化钡，请判断是否可行， ，理由是 （4）某同学认为该实验方案中加适量BaCl 2 溶液不容易控制，应加入过量BaCl 2 溶液。实验操作方案如...
【简答题】俄国伟大的作曲家柴科夫斯基的最后一部作品《悲怆》是他的《______交响曲》。 A．第五 B．第六 C．第七 D．第九 A． B． C． D．
【单选题】The people living in the United States will not be faced with water shortages.
A.
Y
B.
N
C.
NG
【简答题】For the people living in the Nile Basin, the river is their life．This 6,825 km waterway, whose watershed（流域）covers three million square kilometers, flows through mountains ,woodlands, lakes and desert...
【单选题】The people living in that apartment have free to that swimming pool.They don't have to be charge
A.
The people living in that apartment have free ____to that swimming pool.They don't have to be charged. A．time
B.
access
C.
entrance
D.
care
【简答题】阅读理解。 For the people living in the Nile Basin, the river is their life. This 6 825 km waterway, whose watershed (流域) covers three million square kilometers, flows through mountains, woodlands, lakes a...
【简答题】For the people living in the Nile Basin, the river is their life:. This 6,825 km waterway, whose watershed（流域） covers three million square kilometers, flows through mountains ,woodlands, lakes and des...
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