新制的氯水显__________色，说明氯水中有__________分子存在。向氯水中滴入几滴AgNO3溶液，立即有__________生成，说明氯水中有__________存在，蓝色石蕊试纸
下列说法正确的是（ ） A．硬水就是硬度很大的水 B．氯化钠是由氯化钠分子构成的 C．最外层电子数为8的粒子一定是稀有气体原子 D
“入世五年，成绩A+”。世界贸易组织总干事拉米如此盛赞中国，是因为我国政府严格、有效地履行了入世承诺。其主要表现是( )①积极参与双边、
已知有理数a，b所对应的点在数轴上的如图所示，则有（） A.－a＜0＜b B.－b＜a＜0 C.a＜0＜－b D.0＜b＜－a
I like skiing better than climbing because I think climbing is ____________skiing. A. not as exciting as B. not as more exciting as C. not as most exciting as
现代采煤方法中，有一种方法是用高压水流将煤层击碎而将煤采下，水流从高压水枪中射出，喷射速度很大 ，水流能将煤层击碎是因为水流 A．
We must make sure that public facilities in the newlybuilt buildings，like the restroom and the lift，are ______ to disabled visitors. A．impressive B．independent C．remarkable D．access
The family had just moved．The young woman was feeling a little 21 ．It was Mother's Day—and 800 miles separated her from her parents． She had called them that morning，and her mother
