问题
选择题
Her _______ eyes make her _______ really kind. [ ]
A. smiling; look
B. smiling; looks
C. smile; look
D. smile; looks
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Her _______ eyes make her _______ really kind. [ ]
A. smiling; look
B. smiling; looks
C. smile; look
D. smile; looks
答案：A
在200 mL 1 mol/L的NaHCO3溶液中，加入一定量的单质或化合物X，恰好使其转化为只含Na2CO3溶质的溶液（不考虑溶质的水解），实现转变的物质X有多种，符合条件的X物质的一组是
| 编号 | A | B | C | D |
| X的化学式 | Na | Na2O | Na2O2 | NaOH |
| 加入X的质量（g） | 4.8 | 6.4 | 7.8 | 16.0 |