| 听独白回答问题。 |
| 1. How much salt do you need for the experiment? |
| A. A full spoon. B. Half a spoon. C. About 6 spoons. |
| 2. What do we need to pay attention to when doing the experiment? |
| A. Not mixing the water. B. Not adding salt. C. Putting the egg into the water. |
| 3. If you do the experiment successfully, what can you see? |
| A. The egg sinks to the bottom.(底部). B. The egg stays in the middle of the glass. C. The egg stays at the top of the glass. |
| 4. From the experiment, we know that _________. |
| A it's exciting to do experiments B.Salty water is heavier than drinking water C.water can't be mixed |