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单项选择题
下列各组物质中,能相互反应且反应前后溶液总质量保持不变的是()
A.硫酸铜溶液和氢氧化钠溶液
B.稀硫酸和氢氧化钠溶液
C.碳酸钠溶液和稀盐酸
D.硝酸钾溶液和氯化钠溶液
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相关考题
单项选择题
环形拓扑结构的优点有()
A.路由选择控制简单
B.电缆长度短
C.适用于光纤
D.环形拓扑所需电缆长度比星型拓扑结构要长
E.环形拓扑所需电缆长度比总线型拓扑结构要短
单项选择题
Acts of infringing upon rights of another person include: 1.______(组织) or 2.______(胁迫) or 3. ______(诱骗) those under 16 or the disabled to give terrifying or inhumane performances; forcing another person to work by means of 4. ______ (暴力) or 5. ______ (威胁)or other means; illegally 6. ______(限制) another person’s freedom of the person; illegally making a body search of another person; writing letters of 7. ______(恐吓) or threatening another’s personal safety by other means; openly 8______( 侮辱) another person or 9. ______(诽谤) another person by 10. ______(捏造) stories.
A.______(组织)
B.______(胁迫)
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釆用冷压工艺时,依照接头的截面大小选用冷压工装的模具()
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