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- 1下列量子数的组合表示一电子的运动状态,哪些是不合理的?n=3,l=0,m=0,ms=+-1/2 哪个量子数出错了?
- 2水字旁加个兄弟的兄字读什么?
- 3将表面被氧化为Na2O的金属钠10.8g,投入89.4水中溶解,若收集到2.24L气体(标准状况),所得溶液密度为1.2g/mi.求:(1)Na2O的质量;(2)所得溶液的质量分数;(3)所得溶液的物质的量溶液
- 4Let's playing football 改错
- 5(1/cos80平方-3/cos10平方)乘以1/cos20怎么做
- 6中那句是拟人句?
- 7This is really what she is _____.She has spared no effort to achieve this aim.
- 8一部拖拉机耕一片地,第一天耕了这片地的2/3;第二天耕了剩下部分的1/3,还剩下42公顷没耕完,则这片地共有_公顷?
- 9Her face gave her_when she told
- 10the light turned red so they came to a complete stop 整句翻译 came to这里怎么解释