填空题
Questions 26-30
Complete the notes below.
Write NO MORE THAN TWO WORDS for each answer.
Assembly
Step 1
Fold (26) in half.
Step 2
Use (27) to secure the ends.
Step 3
Attach (28) to diver.
Step 4
Fill bottle with water and replace (29) .
Step 5
Demonstrate by squeezing and releasing bottle. Compression causes diver to sink because diver becomes (30) .