问题
选择题
I ____ my pen everywhere, but didn't ____ it. [ ]
A. looked for; find
B. look for; find
C. looked for; found
D. look for; found
答案
答案：A
搜题请搜索小程序“爱下问搜题”
I ____ my pen everywhere, but didn't ____ it. [ ]
A. looked for; find
B. look for; find
C. looked for; found
D. look for; found
答案：A
小明家中有小小实验室，他收集的物质有①溶液：盐酸、AgNO3溶液、酒精和白醋4；②固体：食盐、鸡蛋壳、废铝片和发酵粉．小明按右图所示的方法实验，有气泡产生，一会儿蜡烛熄灭，白色固体消失．看到上述现象后，小明的同学小亮认为试剂瓶中的溶液为盐酸，玻璃杯中的固体为鸡蛋壳．除此之外，你认为溶液和固体的组合还可能是什么？请填入下表中（任写三种不同组合）．
| 组合种类 | 1 | 2 | 3 |
| 溶 液 | ______ | ______ | ______ |
| 固 体 | ______ | ______ | ______ |
