问题
选择题
mother is a worker.[ ]
A. Marry and Mike's
B. Marry's and Mike's
C. Marry's and Mike
D. Marry and Mike
答案
答案：A
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mother is a worker.[ ]
A. Marry and Mike's
B. Marry's and Mike's
C. Marry's and Mike
D. Marry and Mike
答案：A
下列反应的离子方程式，不正确的是（ ）
| A．氢氧化钡溶液与硫酸反应：Ba2＋+2OH－+SO42-+2H＋ | B．金属钠与水反应：Na+2H2O |
| C．碳酸氢钠溶液和稀硫酸混合：HCO3－+H＋ | |
| D．硝酸银溶液跟盐酸作用：Ag＋＋Cl－＝AgCl↓ |