问题
选择题
| The knife ______ we cut the bread is very sharp. |
A. which B. with C. with it D. with which |
答案
答案：D
搜题请搜索小程序“爱下问搜题”
| The knife ______ we cut the bread is very sharp. |
A. which B. with C. with it D. with which |
答案：D
下表为元素周期表的一部分，有关说法正确的是
| 族 周期 | IA | 0 | ||||||
| 1 | ① | ⅡA | ⅢA | ⅣA | ⅤA | ⅥA | ⅦA | |
| 2 | ② | ③ | ④ | |||||
| 3 | ⑤ | ⑥ | ⑦ | ⑧ | ||||
A．④、⑤、⑥、⑦、①的原子半径依次减小
B．⑤、⑥、⑧的最高价氧化物对应的水化物不能相互反应
C．⑦、②、③、④的氢化物的稳定性依次增强
D．②、③的气态氢化物均能与它们的最高价氧化物对应的水化物反应