问题
选择题
9. The other day he ran across one of his friends on the street, whom he ___________for ages.
A．hadn’t seen
B．didn’t see
C．hasn’t seen
D．doesn’t see
答案
答案：A
搜题请搜索小程序“爱下问搜题”
9. The other day he ran across one of his friends on the street, whom he ___________for ages.
A．hadn’t seen
B．didn’t see
C．hasn’t seen
D．doesn’t see
答案：A
下列有关仪器的名称、图形、用途与使用操作的叙述均正确的是[ ]
名称 | 图形 | 用途与操作 | |
| A. | 250mL容量瓶 |  | 配制10mol/LNaCl溶液定容时仰视刻度配 |
| 得的溶液浓度小于10mol/L | |||
| B. | 分液漏斗 |  | 用酒精萃取碘水中碘，分液时，碘层需 |
| 从上口放出 | |||
| C. | 酸式滴定管 |  | 可用于量取10.00mL的Na2S2O3溶液 |
D. | 冷凝管 |  | 蒸馏实验中将蒸气冷凝为液体 |